1.He had no idea of what had happened outside.
He didn't know what had happened outside.
2.You should do your own homework.
3.Both he and his friend(s) found/thought this movie very interesting.
1.He had no idea of what had happened outside.
He didn't know what had happened outside.
2.You should do your own homework.
3.Both he and his friend(s) found/thought this movie very interesting.