1. Emily is sick today, so she cannot go to school.  If Emily weren’t . 2.Anna types more carefully than me.  I don’t ………………………………… 3He last met my sister last summer. =>He………………………………………………. 4.We haven’t been to the concert for aver a year. => The last time …………………………………………….. 5.The last time we saw him was on Monday. => We haven’t ………………………………………..

1. If Emily weren’t sick today, she could go to school (If2: một việc không có thật ở HT: If + S + V_ed/2 (tobe thường là "were"), S + would/could/should + V(inf)

2. I don't type as carefully as Anna (So sánh bằng: S1 + V + (not) + as + adj/adv + as + S2)

3. He hasn't met my sister since last summer (S + last + V_ed/2 + (when/in/on/at) + mốc thời gian = S + have/has + not + Vp.p + since + mốc thời gian)

4. The last time we were to the concert was over a year ago (S + have/has + not + Vp.p + for + khoảng thời gian = The last time + S + V_ed/2 + was + khoảng thời gian + ago)

5. We haven’t seen him since Monday (The last time + S + V_ed/2 + was + when/in/on/at + mốc thời gian = S + have/has + not + Vp.p + since + mốc thời gian)