A: Why do you have to leave?
B: I don't have to, but I should. It's late.
Form
Need to and have to are not modal verbs, but they are used in a similar way. Study the following form for the past and present:
Positive Sentences
| I You We They |
need to have to
needed to had to |
go. study. sleep. |
| He She It |
needs to has to
needed to had to |
Negative Sentences
| I You We They |
do not (don't) did not (didn't) |
need to have to |
go. study. sleep. |
| He She It |
does not (doesn't) did not (didn't) |
Yes / No Questions
|
Do Did |
I you we they |
need to have to |
go? study? sleep? |
|
Does Did |
he she it |
Short Answers
|
Yes, (I / you / we / they) do / did. Yes, (he / she / it) does / did. |
|||
|
No, (I / you / we / they) don't / didn't. No, (he / she / it) doesn't / didn't. |
Wh Questions
|
Where When Why What time ... |
do did |
I you we they |
need to have to |
go? study? sleep? |
|
does did |
he she it |
Use
Have to and need to have a similar meaning to must. They are used to describe obligations or things that are necessary to do:
I have to do my homework.
I need to do my homework.
I must do my homework.
Michelle has to leave soon.
Michelle needs to leave soon.
Michelle must leave soon.
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