modal+verbs

GENERAL REVISION media type="custom" key="22386250"

[|mixed 1] [|mixed 2] [|mixed 3] [|mixed 4]

HAVE TO, MUST, SHOULD media type="custom" key="22386208" [|exercise 1]

CAN, COULD, BE ABLE TO media type="custom" key="22386212" [|Exercise 1] LACK OF OBLIGATION IN THE PRESENT AND PAST: don't have/need to, didn't have/need to, needn't have media type="custom" key="22386220" [|exercise 1]

CERTAINTY in the present and past: MUST, MIGHT, CAN'T media type="custom" key="22386222" [|exercise 1]

PERFECT MODALS media type="custom" key="22386234" [|perfect modals 1]