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1 You don’t can go to the party.
2 He musts take his dog for a walk.
3 I can to help you.
4 He not must be late.
5 Can his brother speaks French?
6 Paul must to go there.
7 You don’t must smoke here.
8 Actors may learn a lot of dialogues by heart.
9 Your glass is empty. Must I refill it?
10 Would I introduce Mr. Brown to you?
11 My sister can to play a few musical instruments.
12 Some years ago I didn’t can speak English.