giải chi tiết giúp e với ạ

`1` It's colder today than it was yesterday.

`2` It takes longer by train than by car.

`3` We are busier at work today than every day.

`4` Jane's sister doesn't cook as well as her.

`5` Nobody in this team plays football better than Tom.

`6` After David had gone home, we arrived.

`7` Before we took a look around the shops, we had had lunch.

`8` When we got out of the office, the light had gone out.

`9` By the time we started our work, she had explained everything clearly.

`-----`

`***` So sánh hơn

`-` Với tính từ: S1 + be + adj-er/more adj + than + S2

`-` Với trạng từ: S1 + V + adv-er/more adv + than + S2

`***` Quá khứ đơn `-` quá khứ hoàn thành

`-` Before + S + V2/ed, S + had + V3/ed: Trước khi

`-` After + S + had + V3/ed, S + V2/ed: Sau khi

`-` When/By the time + S + V2/ed, S + had + V3/ed

`-` When/By the time + S + had + V3/ed, S + V2/ed

`=>` Diễn tả một hành động diễn ra trước hoặc sau hành động khác trong quá khứ. Hành động diễn ra trước dùng quá khứ hoàn thành (had V3/ed), hành động diễn ra sau dùng quá khứ đơn (V2/ed).

1. It's colder today than yesterday

2. It takes longer by train than by car

3. We are busier at work today than everyday

4. Jane's sister cooks worse than Jane

5. Nobody in this team plays football better than Tom

6. After David had gone home, we arrived

7. Before we took a look around the shops, we had had lunch

8. When we got out of the office, the light had gone out.

9. By the time we started our work, she had explained everything clearly

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So sánh hơn kém: S + beV + adj-er (adv-er)/more adj (more adv) + than + S2

Nobody/...... + be/V + adj-er (adv-er)/more adj (more adv) + than + S

After + S + had + VpII, S + V2/ed + O

Before + S + V2/ed, S + had + VpII + O

When/By the time + S + V2/ed, S + had + VpII + O