`color{white}{#MPhuc}`

`51.` buys

`+` HTĐ : `( + )` S + Vs-es + ...

`-` DHNB : often

`52.` aren't drinking

`+` HTTD : `( - )` S + is / am / are + not + V-ing

`-` DHNB : at the moment

`53.` are climbing

`+` HTTD : `( + )` S + is / am / are + V-ing

`-` DHNB : Look !

`54.` is crying

`-` DHNB : now -> HTTD

`55.` are always talking

`+` HTTD : diễn tả một hành động thường xuyên xảy ra và gây khó chịu cho người khác.

`56.` are you doing

`+` HTTD : `( ? )` Wh/h + is / are + S + V-ing ?

`-` DHNB : now

`57.` sets off

`-` DHNB : ever fifteen minutes -> HTĐ

`58.` won't go

`+` TLĐ : `( + )` S + will + V-inf

`-` DHNB : tonight -> TLĐ

`59.` will be eating

`+` TLTD : `( + )` S + will + be + V-ing

`-` DHNB : at this time next week

`60.` will be helping

`-` DHNB : at this time tomorrow -> TLTD

Trả lời:

`51.` buys

`52.` aren't drinking

`53.` are climbing

`54.` is crying

`55.` talk

`56.` are you doing

`57.` sets off

`58.` won't go

`59.` will be eating

`-` `DHNB:` tonight

`60.` will be helping

`@` Hiện tại Đơn:

`-` Động từ thường:

`(+)` S + V(-s/-es) + O

`(-)` S + do/does + not + V + O

`(?)` Do/Does (not) + S + V + O `?` 

`-` `DHNB:` Trạng từ chỉ tần suất ( always, usually, often,..),..

`@` Hiện tại tiếp diễn:

`(+)` S + am/is/are + V-ing

`(-)` S + am/ is/ are + not + V-ing

`(?)` Am/ Is/ Are + S + Ving `?

`-` `DHNB:` at the moment, now, Listen!, Look!,..