Must:
My friend must trust me.
My friend must respect me.
My friend must spend with me a lot of time.
Mustn't:
My friend mustn't tell lies to me.
My friend mustn't walk without me.
My friend mustn't do unexpected things.
Здесь есть 2 смешанных диалога . Что такое диалоги .
Диалоги это разговор двух или более людей.
но что за 2 смешанных диалога я не понимаю
3. I forgot
4.did you get
5.i did not speak to her
6.Did you have
7. he did not go
8. she arrived
9.did Robert live
10. the meal did not cost
В зависимости от контекста-и <span>present simple,(для однородных членов предложения)и present continuous(действие в процессе) употребимы.</span>