Must / Mustnít vs Have to / Donít Have To Worksheet

This is a 2- page worksheet for teaching or revising modal verbs at elementary level.
There are 4 different activities in which students are asked to rewrite the sentences, using a form with got instead of the simple verb have, make negative sentences, change the sentences into the interrogative and change the sentences into obligation, using must or the form have + got, as the case may be.