Complete with: have to, don't have to. 1 I ..... do it tonight. It's urgent! 2 You ..... water the plants. I've done it. 3 Do you ..... leave so early? 4 He ..... go to school. He's ill. 5 You ..... pay £10 to become a member.

Решение:

Выбираем have to, когда что-то нужно сделать по обстоятельствам или по правилу. Выбираем don't have to, когда делать что-то необязательно.

1. I have to do it tonight. It's urgent! (Нужно сделать из-за срочности)
2. You don't have to water the plants. I've done it. (Необязательно, так как уже сделано)
3. Do you have to leave so early? (Вопрос о необходимости уйти рано)
4. He has to go to school. He's ill. (Нужно идти в школу, несмотря на болезнь - так требуют обстоятельства)
5. You have to pay £10 to become a member. (Правило, условие для членства)

Ответ: 1. have to; 2. don't have to; 3. have to; 4. has to; 5. have to.