1.All you heard they opening the door and then enter the room.

2.Did the pupils see the teacher enter the classroom and began to write something on the blackboard?

3.My sister noticed him leaving the room.

4.He felt someone coming into the flat,

5.They saw the employees leaving the office.

6.The children noticed their grandmother opening the door of their room.

7.They watched the ship approaching the shore.

8.Nick saw you cross the street and walking up to his house and went out to meet you.

9.Bess watched her daughter open her bag, and trying to find something there.

10.Did Fred see a group of people walking to the metro station?