Since vs For: Choose by Start Point or Length of Time
Do not choose from the general idea of “time.” Check the time signal beside the blank: a start point or a length of time.
This page trains the time meaning of since and for. Both words have other uses in English, so use this decision only when the sentence is showing time.
The fastest reliable clue is usually the time expression immediately after the blank.
Start point or length?
since 2021, since Monday, since the merger, since joining the company.
for three years, for two weeks, for several months, for a long time.
The office has been closed since last Friday.
Last Friday tells you when the situation began.
The office has been closed for five days.
Five days tells you how long the situation has continued.
Events can mark the start too
A start point is not always a date or a day. An event can tell you where the time begins.
The accounting system has been updated regularly since the new manager arrived.
Ms Tanaka has worked in the finance department since joining the company.
For can describe past, present or future length
For is not limited to situations continuing up to now. It can simply tell you the length of an activity or situation.
The warehouse has been operating at full capacity for two weeks.
The customer service desk will remain open for another hour.
That makes the time signal more useful than trying to memorise one sentence type.
Quick TOEIC check
Choose first. Then read the feedback and compare your decision with the time signal.
1. The marketing team has used the new software ___ January began.
Correct. January is a start point.
Not this time. For needs a length of time, such as for three months.
2. The warehouse has been operating at full capacity ___ two weeks.
Not this time. Two weeks is not a start point. It is a length of time.
Correct. Two weeks shows how long the situation has continued.
3. Ms Tanaka has worked in the finance department ___ joining the company.
Correct. Joining the company is the point where the time began.
Not this time. For would need a length of time, such as for eight years.
4. The customer service desk will remain open ___ another hour.
Not this time. Another hour shows a length of time.
Correct. Another hour tells you how long the desk will remain open.
Use repeated mistakes as evidence
A single missed item does not establish a Learning Block. If the same error appears repeatedly across several attempts, review whether you are skipping the time signal, translating too early, relying on one familiar example, or continuing to debate after the sentence has already shown start point versus length.
You may answer before checking the time words beside the blank.
You may rely on one example instead of checking the current time signal.
You may translate both choices first and miss the simpler start-versus-length clue.
You may keep debating after the time signal has already narrowed the answer.
Use small TOEIC mistakes as a diagnostic
If the same since/for error keeps appearing in timed practice, review the decision pattern as well as the words. One missed item alone is not enough evidence to identify a Learning Block.
Continue reading
Use these pages to turn small Part 5 mistakes into faster, cleaner decisions.