1. at→to (tobe+ging to somewhere: đang đi đến đâu dó, 1 nơi nào đó)

2. is boiling→boils (HTĐ, diễn tả sự thật chân lý hiển nhiên, S + Vinf/Vs/es + O)

3. doesn't rain→is raining (HTTD, nhận bt: now, S + am/is/are + Ving + O)

4. to→how to (learn how to do sth: học cách lm 1 cái j đó)

5. being in→in (S + am/is/are + in + somewhere)

6. at→in (in + năm)

7. happily→happy (fell + adj miêu tả cảm xúc)

8. deaf→the deaf (the deaf: người điếc, người khiếm thính)

9. ran (QKĐ, S + Ved/V2 + O, run-ran-run)

10. buying→buy (be going to, S + am/is/are + going to + Vinf + O)

1. We are going at the concert tonight. -> to (be going to)

2. Water is boiling at 100 degrees Celcius. -> boils

3. Let's go out now. It doesn't rain now. -> isn't raining

4. Minh learned to swim when he was a child. -> how to 

5. She is being in London at the moment. -> in

6. My family moved to this city at 2005. -> in 

7. They felt happily when they got the good results. -> happy

8. Alexander Bell taught in a school for deaf. -> of the (của những người bị khiếm thính)

9. When he heard the words, Watson rushed upstairs, run into Bell's room, and shouted, "I heard you!" -> ran (chuyển thành thì qk)

10. He is going to buying a new computer. -> buy (be going to+V)