144
10
3
1
5. 4
Modal verbs can have to and must.
Can
We use can to talk about rules that other people make for us.
I can
go online when I want. (It's OK/allowed. )I can't
watch TV after 10 p. m. (It isn't OK. )Can
you invite friends to stay? (Is it OK?)Have to.
We use have to to say that something is necessary and don't have to to say that something isn't necessary.
You have to
come home straight after school. (It's necessary. )You don't have to
come home straight after school. (It isn't necessary. )