nôt hô e vs ạaaaaaaaaa

`8)` Did he chat with his friends online at `10` p.m. yesterday?

`->` yesterday `=>` QKĐ

`->` Did + S + V-inf ... ?

`9)` I have been saving money for months to buy a new car.

`->` for months `=>` HTHTTD (do tới hiện tại vẫn đang xảy ra)

`->` S + have/has + been + V-ing ...

`10)` John was singing while his friends were dancing at the party.

`->` S1 + was/were + V-ing + while + S2 + was/were + V-ing ...

`->` `2` HĐ đang xảy ra // trong quá khứ `=>` QKTD

`11)` They have been studying Spanish all year to prepare for their trip.

`->` all year `=>` HTHTTD (do tới hiện tại vẫn đang xảy ra)

`->` S + have/has + been + V-ing ...

`12)` My brother has been practicing the guitar all month to improve his skills.

`->` all month `=>` HTHTTD (do tới hiện tại vẫn đang xảy ra)

`->` S + have/has + been + V-ing ...

`-`

@magnetic

` 8`. Was he chatting with his friends online at 10 p.m yesterday?

` -` at + giờ cụ thể trong quá khứ ` ->` QKTD

` -` QKTD : Was/were + S + V-ing + ...?

` 9`. I have been saving money for months to buy a new car.

` -` for months ` ->` HTHTTD

` -` HTHTTD : S + have/has + been + V-ing + ...

` 10`. John was singing while his friends were dancing at the party.

` -` Hai hành động xảy ra song song trong quá khứ

` -` QKTD : S + was/were + V-ing + ...

` 11`. They have been studying Spanish all year to prepare for their trip.

` -` all year ` ->` HTHTTD

` -` HTHTTD : S + have/has + been + V-ing + ...

` 12`. My brother has been practicing the guitar all month to improve his skills.

` -` for months ` ->` HTHTTD

` -` HTHTTD : S + have/has + been + V-ing + ...