LESSON 3A GRAMMAR
Had to → is the past form of "have to," which expresses necessity or obligation in the past. It indicates that something was required or mandatory at that time.
To talk about past obligation or necessity, we use had to
Example: I had to finish my report by Friday.
could → is the past form of "can," and it indicates ability or possibility in the past. It often refers to something that was possible or something someone was able to do.
To say that something was or wasn’t possible or allowed in the past, we use could/couldn’t
Example: When I was a child, I could swim very well.
Affirmative: I/You/He/She/It/ We/They + had to + work.
Negative: I/You/He/She/It/ We/They + did not (didn’t) have to + work.
Yes/No questions: Did + I/you/he/ she/it/ we/they + have to + work?
Yes, I/he/she/it did.
No, I/he/she/it did not (didn’t).
Wh- questions: What + did + I/you/we/ they/he/ she/it + have to + do?
Subject questions: Who + had to + work?