Giúp em với ạ em sẽ vote 5 sao..

`18`. The secretary apologized for being late for the meeting

`-` Apologize for Ving: Xin lỗi ai vì điều gì....

`19`. Had he been more patient, he could have won Mike.

`@` Đảo ngữ câu điều kiện loại `3`:

`-` Had + S + (not) + been + ..., S + would/coould + have + V3/ed

`20`. Unless his mother allows him, he will not come here.

`@` Câu điều kiện loại `1`:

`-` If + S + doesn't/don't + V-inf, S + will/can/may + (not) + V-inf

`=` Unless + S + V(s,es), S + will/can/may (not) + V-inf

`21`. If he hadn't been sick, he would have gone to work.

`@` Điều kiện loại `3`:

`-` If + S + had + (not) + V3/ed, S + would/could + have + V3/ed

`->` Diễn tả hành động không có thật trong quá khứ'

`22`. He invited me to have a drink with him.

`-` Invite sb to do sth: mời ai đó làm gì..

`23`. The police prevented him from escaping.

`-` Prevent sb from Ving: lường trước vấn đề và muốn làm gì để ngặn chặn nó xảy ra...

`24`. This is the first time I have ever heard such an interesting story.

`-` This is the first time + S + have/has + ever + V3/ed + such + (a/an) + adj + Noun

`=` S + have/has + never + V3/ed + such + (a/an) + adj + noun  + before