1. was (past simple)

2.have been (present perfect)

3. will cycle (future simple)

4. am staying ( present continious)

5. didn't do(past simple)

6.has taught(present perfect)

7. went....had( past simple)

8. arrived(present simple)

1. has been - có two years ago → thì HTHT→ dùng has been

2. have been - có many times this year → thì HTHT → dùng have been

3. wil cycle - có tomorow → thì TLĐ → dùng wil cycle

4. am staying - có at the moment → thì HTTD → dùng am staying

5. didn't do - có was → thì QKĐ → dùng didn't do

6. has taught - có for two years → thì HTHT → dùng has taught

7. went - có last year → thì QKĐ → dùng went ; had - sự việc diễn ra sau khi tôi đi Scotland → dùng thì QKHT → dùng had had (tóm lại, trong nếu 2 hành động cùng xảy ra trong quá khứ, dùng thì QKHT cho hành động xảy ra trước và QKĐ cho hành động xảy ra sau)

8. would arrive - kể về sự việc có thể hoặc bắt buộc xảy ra → dùng would arrive