Use to where necessary. 1. I saw him _______ drop his bag. 2. We expected Tom _______ be late. 3. The officer made Ann _______ open her suitcase. 4. Ann was made _______ open her case. 5. Suddenly they heard the front door _______ open and then _______ close softly. 6. Let me _______ carry your bag for you. 7. Do you want me _______ come with you? 8. I like my Granny _______ tell us fairy-tales. 9. Have you ever seen her _______ dance? 10. Hot weather makes me _______ feel tired

Здесь нужно вставить to там, где оно требуется, и оставить голый инфинитив (без to) там, где по правилу to не ставится.

Ключевые правила:

• После see/hear/feel (глаголы восприятия) обычно: object + V (без to), когда речь о том, что наблюдали/слышали как факт целиком.

• После expect/want/would like: обычно to + V.

• После make/let в активном залоге: V (без to).

• После make в пассиве: to + V (was made to do).

• После hear + object: чаще V (без to).

Теперь по пунктам:

1. I saw him drop his bag.
   После saw (восприятие) — без to.

2. We expected Tom to be late.
   После expected — to be.

3. The officer made Ann open her suitcase.
   После made (актив) — без to.

4. Ann was made to open her case.
   Пассив от make: was made to + V.

5. Suddenly they heard the front door open and then close softly.
   После heard — без to; оба глагола относятся к двери: heard the door open and then close.

6. Let me carry your bag for you.
   После let — без to.

7. Do you want me to come with you?
   После want — to come.

8. I like my Granny to tell us fairy-tales.
   После like в такой конструкции (like + object + инфинитив) обычно ставят to: like someone to do something.

9. Have you ever seen her dance?
   После seen (восприятие) — без to.

10. Hot weather makes me feel tired.
    После makes (актив) — без to.