* Each sentence below contains mistake. Write the mistake and correct it.
1. This cooker, which my sister bought it yesterday, is very expensive.
2. I haven’t finished to decorate the Christmas tree yet.
3. The gas from the chemical factory is extreme harmful to our health.
4. My son didn’t worn that uniform since last year.
1. This cooker, which my sister bought it yesterday, was very expensive.
2. I haven’t finished decorate the Christmas tree yet.
3. The gas from the chemical factory are extreme harmful to our healthy.
4. My son hasn’t worn that uniform since last year.
1. This cooker, which my sister bought it yesterday, is very expensive.
→ bỏ it đi vì relative clause( mệnh đề quan hệ )which được thay thế cho cooooker nên k cần it
2 I haven’t finished to decorate the Christmas tree yet.
→đổi thành decorated vì đây là hiện tại hoàn thành
3 The gas from the chemical factory is extreme harmful to our health.
→extremely
4 My son didn’t worn that uniform since last year.
→hasn’t worn