Decide in which sentences you can use Participle 1 instead of

Decide in which sentences you can use Participle 1 instead of the Infinitive. Write these sentences with Participle 1 down.
1)I felt a snowflake fall on my хэнд.
2)We noticed Andrew enter the classroom.
3)I never expected him to do such a thing.
4)She saw her son drive up to the cottage and come in.
5)They watched their friends play volleyball.
6)He has never heard his aunt sing.