Read these sentences and choose must or mustnt. 1. You annoy your little brother .2. You play with matches. It's dangerous. 3.People stand here. It is not safe. ​

1. You mustn't annoy your little brother. 2. You mustn't paly with matches. It's dangerous. 3. People mustn't stand here. It is not safe.

Объяснение:

Mustn't ставится тогда, когда ты или кто-то еще не должен что-либо совершать, а must ставится тогда, когда ты обязан что-нибудь сделать.