Here you have different exercises in which you have to rephrase the sentence so that it has the same meaning as the original. There are also perfect modals. I'm sure you'll find them useful.
One. Once in there choose Modal verbs 1 in the left column.
Two. Once in there choose Modal verbs 2 in the left column.
Three. Once in there choose Modal verbs 3 in the left column.
Four. Once in there choose Modal verbs 4 in the left column.
