Lesson article
Spot the signal, compare it, then read it in context
Read all 4 sections in order. Notice the target form, compare it with the nearby alternative, then use the reading and practice below to check the meaning in context.
Section 1 of 4
Core contrast
Distinguish 〜 from 〜 in time expressions.
Start with the example
、。
During summer vacation, I read Japanese every day.
specifies daily reading across the vacation. This does not mean reading continuously every moment.
Notice the variation
、。
While I was taking a shower, a package arrived.
The delivery happened one time inside the shower interval.
More detail: how to apply this
frames a period during which a state or repeated activity holds.
places an event or change within that period.
The contrast is not a count rule: can contain more than one event, as in (there were two calls while I was out).
Explain it another way
Try a different way of looking at the same idea.
Draw the wider interval first, then locate an event inside it without inventing how often it happened.
gives the event that occurred inside it. No exact cleaning duration or frequency is supplied.
、。
While my mother was traveling, I cleaned the room.
Draw the wider interval first, then locate an event inside it without inventing how often it happened.
Showing Try this approach: Everyday words.
Target signal
、。
During summer vacation, I read Japanese every day.
specifies daily reading across the vacation. This does not mean reading continuously every moment.
Vocabulary notes
- 夏休み
- summer vacation
- あいだ
- while; during
- 日本語
- Japanese language
Compare in context
、。
While I was taking a shower, a package arrived.
The delivery happened one time inside the shower interval.
Vocabulary notes
- あいだに
- while; during
Section 2 of 4
How to choose
How to choose
Start with the example
、。
While my mother was traveling, I took care of the dog.
lasted through the mother's trip.
Notice the variation
、。
While my mother was traveling, I cleaned the room.
The room-cleaning is placed within the mother’s trip. This sentence does not specify a number of cleaning sessions.
More detail: how to apply this
Use for an activity or condition spanning the reference period;
use to locate an occurrence or change within it.
Check other words for frequency and duration.
explicitly means once;
alone does not.
Explain it another way
Try a different way of looking at the same idea.
While my mother was traveling, I took care of the dog.
lasted through the mother's trip.
、。
While my mother was traveling, I took care of the dog.
Return to the Japanese and locate the words supporting this meaning: While my mother was traveling, I took care of the dog.
Showing How to choose: Everyday words.
Target signal
、。
While my mother was traveling, I took care of the dog.
lasted through the mother's trip.
Vocabulary notes
- あいだ
- while; during
Preview
、。
While my mother was traveling, I cleaned the room.
The room-cleaning is placed within the mother’s trip. This sentence does not specify a number of cleaning sessions.
Vocabulary notes
- あいだに
- while; during
Section 3 of 4
Reading notes
Draw the wider interval first, then locate an event inside it without inventing how often it happened.
Reading notes
、。
Step 1 of 3 · Notice the clue
The mother’s trip supplies the wider time interval.
Step 1: Notice the clue
More detail: the reading method
This pattern helps you map chronology.
In reading passages, 〜 often introduces a key event that interrupts or fits inside a larger background situation. 〜 often describes ongoing background itself.
Explain it another way
Try a different way of looking at the same idea.
During the meeting, mobile phones may not be used.
The rule applies for the entire duration of the meeting.
、。
During the meeting, mobile phones may not be used.
Return to the Japanese and locate the words supporting this meaning: During the meeting, mobile phones may not be used.
Showing Reading notes: Everyday words.
More examples
Target signal
、。
During the meeting, mobile phones may not be used.
The rule applies for the entire duration of the meeting.
Vocabulary notes
- 会議
- meeting
- あいだ
- while; during
Preview
、。
While the teacher was away from the classroom, the students changed seats.
The seat change happened during the teacher's absence.
Vocabulary notes
- あいだに
- while; during
- 学生たち
- students
Section 4 of 4
Compare the meaning
Use the contrast to make a decision. Choose an answer before opening the explanation.
Example A
Example B
Your turn · decide before revealing
How do these two examples change the meaning?
More detail: what changes and why
Compare and .
foregrounds an interval;
plus locates a bounded occurrence inside it.
Explain it another way
Try a different way of looking at the same idea.
Same words, two possible interpretations. Which has evidence?
foregrounds an interval; plus locates a bounded occurrence inside it.
How do these two examples change the meaning?
Supported meaning: Worked during the break as a period / worked once within it
Use the sentence to choose between these interpretations; do not add information that is only in an answer choice.
Showing Compare the meaning: Everyday words.