`1.` I will call you as soon as I arrive at the airport

`-` Sự phối hợp giữa thì HTĐ và TLĐ: S + will + V0 + as soon as + S + V-s/es + O

`2.` You should help them if they need

`->` Câu điều kiện loại 1: S + will/should/... + V0 + if + S + V-s/es + O

`3.` Unless we increase the temperature, we will be frozen

`->` Câu điều kiện loại 1: If + S + V-s/es + O, S + will/... + V0 + O

Unless = If not

`4.` The shop closed after the last customer had left

`->` S + V2 + O + after + S + had + VpII + O

`5.` You must stop when the traffic lights turn red

`->` S + must + V0 + O: bắt buộc làm gì

S + V + when + S + V + O

`6.` My mother always makes breakfast for me before she goes to work

always `->` HTĐ

HTĐ: S + V-s/es + O

`->` S + V + O + before + S + V + O

for sb: cho ai

make + meal

go to swh

`7.` Mai is doing her homework while Nga is listening to music

HTTD: S + is/am/are + V-ing

`->` Diễn tả hai hành động xảy ra song song: HTTD + while + HTTD