Rewrite the sentences replacing the italic part with a present participle or a perfect participle; 1/ She was talking to her friend and forgot anything around her 2/ Since we watch the news everyday we know what's going on in the world 3/ They are vegetarians and don't eat meat 4/ The boy asked his mother's permission and then went out to play 5/ As he had drunk too much, he didn't drive home himself

=>

1. Talking to her friend, she forgot everything around her.

2. Watching the news every day, we know what's going on in the world.

3. Being vegetarians, they don't eat meat.

4. Having asked his mother's permission, he went out to play. 

5. Drinking too much, he hadn't driven home himself.

Hai vế cùng chủ ngữ -> rút gọn thành Ving vế đầu

Having V3/ed (hai vế cùng chủ ngữ, hai hành động xảy ra theo thứ tự trước sau)