1. (Everybody is looking at me.)
I feel as if everybody at me.
I felt as if everybody at me.

2. (He does have a brain in his head.)
He acts as though he a brain in his head.

3. She is coughing and looks very tired. It seems as though she (be) sick.

4. They treat their dog as though it (be) their son.

5. As I explainin the topic, students looked as if they (not, listen)to me.

6. (he hasn't met her)
He talked as if he her