Vault seed record
For three years 2
In a workplace mini-scenario, I’ve worked here ___ three years.
Classification
Provenance
Kind: human-authored
Source: reviewed-expansion-anchor-pack
Batch: reviewed-expansion-core-grammar-control-2026-05
Reviewer: content-lead
Updated: 2026-05-21
Instruction and answer
Instruction
Choose the best answer.
Correct answer
for
Explanation
Use for with a duration and since with a starting point.
Product use
Surfaces
Source languages
Difficulty
medium
Conversion hook
A small time word shows whether the tense is under control.
Review payload
Review notes
Approved seed anchor from the reviewed expansion pack. Used to close family coverage gaps before scaled promotion.
Media prompt
No media prompt attached.
Assets
Source traps
Tags
Usage
Tests: grammar-diagnostic, general-english-level, error-detection
Funnels: general-level-assessment
Challenges: grammar-anchor-20
{
"type": "single-choice",
"correctOptionId": "for",
"options": [
{
"id": "for",
"label": "for",
"rationale": "This is the defensible answer in the context."
},
{
"id": "since",
"label": "since",
"rationale": "This distractor reflects a common learner mistake."
},
{
"id": "during",
"label": "during",
"rationale": "This distractor reflects a common learner mistake."
},
{
"id": "from",
"label": "from",
"rationale": "This distractor reflects a common learner mistake."
}
]
}