Vault seed record

Chinese tense anchor: yesterday finished

The report was completed yesterday. Which sentence says this naturally?

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Classification

reviewed-seedapprovedcore-grammar-controlverb-pattern-correctionsentence-correctionB1Grammar

Provenance

Kind: human-authored

Source: source-lane-anchor-pack

Batch: source-anchor-zh-ar-001

Reviewer: content-lead

Updated: 2026-05-20

Instruction and answer

Instruction

Choose the sentence that matches the time signal.

Correct answer

She finished the report yesterday.

Explanation

When the time is finished and specific, English marks the verb: yesterday -> finished. The time word alone is not enough.

Product use

Surfaces

testdailyfriend-challenge

Source languages

zh

Difficulty

medium

Conversion hook

Looks obvious after the answer, which makes it sticky and shareable.

Review payload

Review notes

First ZH reviewed anchor for tense/aspect transfer.

Media prompt

No media prompt attached.

Assets

translated-phrase-distractors

Source traps

zh-tense-aspect

Tags

zh-tense-aspectpast-simpletenses

Usage

Tests: grammar-diagnostic, tenses, error-detection

Funnels: none

Challenges: zh-yesterday-tense-trap

{
  "type": "single-choice",
  "correctOptionId": "finished",
  "options": [
    {
      "id": "finished",
      "label": "She finished the report yesterday.",
      "rationale": "Yesterday asks for past simple: finished."
    },
    {
      "id": "finish",
      "label": "She finish the report yesterday.",
      "rationale": "The verb needs past marking."
    },
    {
      "id": "finishes",
      "label": "She finishes the report yesterday.",
      "rationale": "Present simple conflicts with yesterday."
    },
    {
      "id": "has-finish",
      "label": "She has finish the report yesterday.",
      "rationale": "This mixes an auxiliary with the wrong verb form."
    }
  ]
}