1. I don't know why she collects pens

- Thì HTĐ dạng phủ định : S + don't/doesn't + V-bare

2. In the future, I will travel around Viet Nam

- Thì TLĐ : S + will + V-bare

- Dấu hiệu : in the future

3. Minh thinks skating is more interesting than playing board games.
- So sánh hơn với tính từ dài : S + V + more + Adj/Adv + than.

4. Listening to music in the free time is my favourite hobby.
- Chỉ sở thích nên phải thêm V-ing

5. My sister and I share the same hobby. We often go fishing at weekends.
- Thì HTĐ : S + Ves/s

- Dấu hiệu : often