How To Sign Yesterday In ASL: A Complete Linguistic And Practical Guide

Master the sign for "yesterday" in American Sign Language (ASL) by forming a "Y" handshape with your dominant hand, placing your thumb near your jawline, and moving it backward toward your ear. This physical movement mirrors the ASL temporal line, where space behind the body represents the past. Perfecting this sign requires precise coordination of handshape, location, movement, orientation, and non-manual markers.

Foundational Anatomy of American Sign Language Time Concepts

Understanding how to sign temporal concepts in American Sign Language requires more than just memorizing static hand shapes. ASL is a rich, natural visual-gestural language with its own distinct syntax and morphological rules. One of the most fundamental structures in ASL is the "temporal line" (or time line).

In ASL, the signer's body serves as the anchor point for the present tense. The space directly in front of the chest and face represents the present moment. The space extending forward, away from the signer's body, represents the future. Conversely, the space extending backward, over the shoulder or along the side of the head, represents the past. Because "yesterday" refers to a past event, the movement of the sign physically travels backward along this temporal line.

To execute this sign accurately and avoid miscommunication, you must prepare by identifying your dominant signing hand and establishing a proper physical frame.

Required Setup and Prerequisite Checklists

Before attempting the sign, review these essential preparation elements:

• Dominant Hand Identification: Determine which hand is your dominant hand. This is the hand you use to write, eat, or perform primary tasks. In ASL, your dominant hand performs the active movements, while your non-dominant hand acts as a base or remains relaxed at your side. Never switch dominant hands mid-conversation, as this causes confusion.
• The Signing Space: Your signing space extends vertically from the top of your head to your mid-torso, and horizontally from shoulder to shoulder. The sign for "yesterday" occurs near the face, specifically on your dominant side.
• Posture and Alignment: Stand or sit with a straight, relaxed posture. Your shoulders should be level, and your head should face forward. Tension in your neck or shoulders can distort the movement path of your hand.

Preparation Checklist

• Essential Gear: None (ASL requires only your body and hands).
• Physical Space: Clear line of sight between you and your conversational partner, with adequate lighting that eliminates shadows on your face.
• Prerequisite Knowledge: Mastery of the ASL fingerspelled alphabet letter "Y" handshape.
• Time Benchmark: 5 to 10 minutes of targeted muscle memory practice for correct mechanics; 1 to 2 weeks for fluid conversational integration.

Mastering the Sign for Yesterday Step-by-Step

Executing the sign for "yesterday" involves coordinating four physical manual parameters (handshape, location, movement, and orientation) alongside one non-manual parameter (facial expression and body posture). Follow these precise steps to build proper muscle memory.

Step 1: Form the "Y" Handshape (Handshape Parameter)

Extend your dominant hand in front of you. Fold your index, middle, and ring fingers down so their tips press firmly against your palm. Simultaneously, extend your thumb and your pinky finger outward as far as comfortable. This configuration forms the letter "Y" in the manual alphabet.

Ensure that your folded fingers remain tightly tucked against your palm. If your middle or ring fingers lift or flare outward, the sign can easily be misread as other signs or appear sloppy.

Pro-Tip: Keep the muscles of your hand engaged but not overly tense. Overextending your thumb and pinky to the point of strain will slow down your transition speeds when signing complete sentences.

Step 2: Place the Thumb at the Starting Position (Location Parameter)

Bring your hand up to the dominant side of your face. Place the tip of your extended thumb directly onto your cheek, near the corner of your mouth or along your jawline.

Your palm should be facing forward or slightly toward your non-dominant side. Your extended pinky finger will point outward, away from your face, and slightly upward.

Warning: Do not press your thumb hard into your cheek or jaw. A light, superficial touch is all that is required. Pressing too hard can cause physical fatigue during extended conversations and disrupt the fluid path of your movement.

Step 3: Sweep the Hand Backward Along the Jawline (Movement Parameter)

Maintaining the "Y" handshape, glide the tip of your thumb backward along your jawline toward your earlobe. The movement should be a smooth, gentle arching stroke that traces the lower contour of your cheek.

The path of the movement is backward, tracking the temporal line to indicate a past event. The thumb should end its movement near the back of the jaw, just below or slightly behind your earlobe.

Step 4: Keep the Movement Compact and Within the Frame

As your hand travels backward, ensure the movement remains compact. The stroke should span approximately 3 to 5 inches. Do not swing your entire arm backward, and do not let your hand drift far behind your shoulder.

The movement is initiated from the wrist and elbow, keeping the hand close to the side of the face throughout the entire trajectory.

Step 5: Incorporate Non-Manual Signals and Temporal Posture

In ASL, facial expressions and body postures (Non-Manual Signals, or NMS) function as the grammatical inflection of your message. When signing "yesterday," your facial expression should remain neutral or slightly relaxed.

To emphasize that an event occurred in the past, you can slightly tilt your head or shoulder backward on your dominant side as you complete the movement. This physical lean reinforces the temporal placement of your statement.

Linguistic Comparison of ASL Temporal Signs

To understand how the sign for "yesterday" fits into the broader grammatical structure of ASL, it is helpful to compare its parameters with other closely related temporal signs. The table below outlines how minor adjustments in movement direction, handshape, or location completely alter the meaning of a sign along the temporal timeline.

Common Mechanical Errors and Correction Guide

Beginners frequently make minor mechanical errors that can alter the meaning of their signs or make them difficult for native signers to comprehend. Use the diagnostic guide below to identify and correct these common errors.

Reversing the Direction of the Movement

• Root Cause: Confusing the past tense direction with the future tense direction along the temporal line, causing the signer to push the "Y" handshape forward instead of pulling it backward.
• Actionable Fix: Practice signing "yesterday" in front of a mirror. Intentionally trace the movement from the corner of your mouth backward toward your ear. Remember this mnemonic rule: the past is behind you, so the sign must move backward.

Collapsing the Handshape

• Root Cause: Allowing the pinky finger to curl inward toward the palm, or letting the middle fingers flare open, turning the "Y" handshape into a thumb-only "A" handshape. This error transforms the sign for "yesterday" into "tomorrow."
• Actionable Fix: Isolate your handshape practice. Hold a "Y" handshape for 15 seconds at a time to build hand strength and flexibility. If your pinky curls inward naturally, use your non-dominant hand to gently assist in stretching and stabilizing the handshape until muscle memory takes over.

Drifting Away from the Face

• Root Cause: Executing the sign several inches away from the cheek without making physical contact or maintaining close proximity to the face.
• Actionable Fix: Slow down your signing speed. Ensure that the tip of your thumb makes light contact with your skin at the start of the sign near your jawline and maintains close proximity to your cheek as it glides back toward your ear.

Omitting Non-Manual Signals in Context

• Root Cause: Keeping the body completely rigid and head tilted forward while discussing past events, which strips the conversational context of its natural temporal inflection.
• Actionable Fix: When practicing sentences that feature "yesterday," allow your torso and head to shift slightly backward. This natural body language helps the receiver process the temporal frame of your sentence before you even begin signing the verbs.

Frequently Asked Questions

Does "yesterday" change if I am left-handed?

Yes, the orientation and hand usage mirror your dominant hand. If you are left-handed, you will form the "Y" handshape with your left hand, place your left thumb near the left corner of your mouth, and glide it backward along your left jawline toward your left ear.

How do you say "day before yesterday" in ASL?

To sign "the day before yesterday," you modify the movement of the sign. Start with your dominant "Y" handshape at your cheek, move it backward toward your ear as you would for "yesterday," and then execute a second backward jump or arch over your shoulder. This double-movement represents two steps backward on the timeline.

What is the grammatical placement of "yesterday" in an ASL sentence?

In ASL grammar, time indicators are typically placed at the very beginning of a sentence to establish the tense before any actions are described. For example, to sign "I went to the store yesterday," you would arrange the signs in the following order: YESTERDAY, STORE, I GO.

Can you sign "yesterday" using both hands?

No, "yesterday" is strictly a one-handed sign. Using both hands to sign "yesterday" is grammatically incorrect and does not exist as a standard variation in American Sign Language. Keep your non-dominant hand relaxed at your side while signing.

How do you sign "yesterday morning" or "yesterday night"?

You sign these concepts by combining two distinct signs in sequence. To sign "yesterday morning," sign YESTERDAY first, immediately followed by the sign for MORNING. To sign "yesterday night" (last night), sign YESTERDAY followed immediately by the sign for NIGHT.

Elevate Your American Sign Language Conversational Skills

To truly master American Sign Language, consistent practice with real-world context and native signers is essential. Commit to practicing your manual parameters daily to build the fluid muscle memory needed for effortless, natural communication.