1.We are going to clean the lake's banks at the weekend

NP:S+be+going to+V(nguyên thể)

2.They are going to plant flowers in the parks and water them in the afternoon after class

NP:S+be+going to+V(nguyên thể)

3.We hope to give more green color to the town and earn some money for our group

NP:S+hope+to+V

4.We raise funds by collecting waste paper and broken glass

NP:S+O+by+V(ing)

1. We are going to clean the lake's bank at the weekend.

→ S + is/ am/ are + going to + V(nguyên thể)

2. They are going to plant flowers in the parks and water them every afternoon after class

→ S + is/ am/ are + going to + V(nguyên thể)

3. We hope to give more green colour to the town and earn some money for our group.

→ S + hope + to + V(nguyên thể)

4. We raise funds by collecting waste paper and broken glass.

→ S + ... + by + V_ing: ai đó làm gì đó bằng cách nào đó.