5. have called - hasn't answered

- for + khoảng thời gian, yet -> HTHT: S + has/have (not) + PII

6. will forget 

- someday -> TLD: S + will (not) + Vinf 

7. won't marry 

- until she is 35 -> TLD

8. will visit - have

- Clause (TLD) + when/until/as soon as + clause (HTD): cho tới khi 

9. have seen

- This is the first/second/third ... time + S + has/have + PII: lần thứ ai đó làm gì

10. has met 

- several times -> HTHT

11. is

- today -> HTD (?) Wh-word + is/am/are + S + N/adj?

12. won't stay - meets 

- Clause (TLD) + when/until/as soon as + clause (HTD): cho tới khi 

13. flows 

- Sự thật hiển nhiên -> HTD

14. are you doing

- at that time -> HTTD (?) Wh-word + is/am/are + S + Ving?

15. were riding 

- When QKD QKTD: hành động đang xảy ra, hành động khác xen vào