1. I think we should taking a shower instead of a bath to save energy

2. My friend is a good soccer player who is very generous and humorous

3. I suggest cleaning the floor

4. The hat is very nice which is nga's grand father

1. I suggest taking a shower instead of a bath to save energy

-> I think we should take a shower instead of a bath to save energy

2. My friend is a good soccer player. He is very generous and humorous (who)

-> My friend, who is very generous and humorous, is a good soccer player.

- mệnh đề quan hệ

3. Let's clean the floor 

-> I suggest cleaning the floor.

-Suggest+V-ing

4. The hat is very nice. The hat is nga's grand father (which)

-> The hat which is nga's grand father is very nice.

- mệnh đề quan hệ

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