Viết theo cấu trúc STARTED + V-ING/ TO V = HAVE + BEEN + V-ING
S + STARTED/ BEGAN + V-ING/ TO V
S + HAVE P2/ HAVE BEEN V-ING
I started doing homework two hours ago.
I have been doing homework for two hours.
Khi sử dụng với thì hoàn thành thì sử dụng với FOR và SINCE.
FOR + khoảng thời gian: for a week, for two hours. Bỏ AGO khi dùng FOR.
SINCE + mốc thời gian bắt đầu: since last week, since I was small. Bỏ WHEN khi dùng SINCE.
- They started playing tennis an hour ago.
- He started learning English 10 years ago.
- I started doing my homework 10 minutes ago.
- We began collecting stamps when I was 8 years old.
- My mother began cooking at 6 pm.
- We started reading the novel last Sunday.
- It started raining 2 hours ago.
- She began writing when she was 21 years old.
- We started having dinner at 7 pm.
- I began doing yoga two days ago.