8.I have played soccer since 2009 ( Thì HTHT , Đặc điểm nhận dạng : since )

9.She has worked as a secretary for 5 years ( Thì HTHT , Đặc điểm nhận dạng : for )

10.We started knowing him four years ago ( Thì QKĐ , Đặc điểm nhận dạng : ago )

11.They started phoning their friend in 7p.m ( Thì QKĐ )

Xin 5 sao + CTLHN

Chúc bạn học tốt :D

# TCV

$8$. I have played soccer since 2009

`->`S + has/have + Ved/3 ( thì HTHT )

`=` S + began + to V-inf ( thì QKĐ )

`->`since + mốc thời gian

$9$. She has worked as a secretary for 5 year

`->`S + has/have + Ved/3 ( thì HTHT )

`=` S + started + V-ing + time + ago ( thì QKĐ )

`->`for + khoảng thời gian

$10$. We started knowing him four years ago

`->`S + has/have + Ved/3 ( thì HTHT )

`=` S + started + V-ing + time + ago ( thì QKĐ )

$11$. They started phoning their friend in 7p.m

`->`S + has/have + Ved/3 ( thì HTHT )

`=` S + started + V-ing ( thì QKĐ )