e1
1. Before I passed the exam, I had worked very hard for it
2. After I had considered what to study, I decided to major in maths
3. After she had written a letter, she went to bed
4. After he had checked the price, he bought a radio
5. After they had argued, they fought
6. Before she had a fatal accident, she had gone out for a walk
7. After she had faced the matter, she decided to go away
8. Before we wrote the assignment, we had read the book
9. After she had watched the film, she wrote a report
Hành động xảy ra trước một hành động trong quá khứ -> S + HAD + V phân từ II
e2
1. Swimming every day is a good way of keeping fit.
2. Learning a foreign language takes a long time
3. Growing your own food is less expensive
4. Sitting in one place for so long is uncomfortable
5. Smoking is not allowed here
Chủ ngữ là một danh động từ (gerund) -> ĐỘNG TỪ Ở HIỆN TẠI CHIA SỐ ÍT