as if/though+主语+did/had done…好像……（表示现在或将来的情况用过去时；表示过去的情况用过去完成时 例句：
It looks as if it is going to rain.
It looked as if…
Our head teacher treats us as if we were her own children, so all the students in our class think highly of her. Alan talked about Rome as if he had been there.
练习：
1. It looked as if someone_____ a patch out of the air.(p 16 B V)
A. cut
B. has cut
C. had cut
D. were cutting 2. The two strangers talked as if they _____ friends for years. A. should be B. would be C. have been D. had been
3. Eliza remembers everything exactly as if it ______ yesterday.
A. was happening
B. happens
C. has happened
D. had happened
4. They talked as if they ______ friends for years.
A. should be
B. would be
C. have been
D. had been
2017届高考英语（重庆专用）二轮精练：必修2 unit5 period 1
2017届高考英语（重庆专用）二轮精练：必修4 unit1 period 1
2017届高考英语（重庆专用）二轮精练：必修3 unit5 period 1
2017届高考英语（重庆专用）二轮精练：必修1 unit4 period 1
2017届高考英语（重庆专用）二轮精练：必修4 unit1 Women of achievement单元测试
2017届高考英语（重庆专用）二轮精练：必修3 unit5 period 2
2017届高考英语（重庆专用）二轮精练：必修4 unit1 period 2
2017届高考英语（重庆专用）二轮精练：必修3 unit1 period 1
2017届高考英语（重庆专用）二轮精练：必修4 unit2 period 1
2017届高考英语（重庆专用）二轮精练：必修1 unit3 period 2
2017届高考英语（重庆专用）二轮精练：必修3 unit4 period 2
2017届高考英语（重庆专用）二轮精练：必修1 unit5 period 2
2017届高考英语（重庆专用）二轮精练：必修2 unit5 Music单元测试
2017届高考英语（重庆专用）二轮精练：必修2 unit4 Wildlife protection单元测试
2017届高考英语（重庆专用）二轮精练：必修4 unit3 A taste of English humour单元测试
2017届高考英语（重庆专用）二轮精练：必修3 unit3 period 1
2017届高考英语（重庆专用）二轮精练：必修4 unit2 Working the land单元测试
2017届高考英语（重庆专用）二轮精练：必修1 unit4 Earthquakes单元测试
2017届高考英语（重庆专用）二轮精练：必修4 unit3 period 1
2017届高考英语（重庆专用）二轮精练：必修2 unit3 period 1
2017届高考英语（重庆专用）二轮精练：必修1 unit2 period 1
2017届高考英语（重庆专用）二轮精练：必修3 unit1 Festivals around the world单元测试
2017届高考英语（重庆专用）二轮精练：必修2 unit3 period 2
2017届高考英语（重庆专用）二轮精练：必修3 unit3 The Million Pound Bank Note单元测试
2017届高考英语（重庆专用）二轮精练：必修1 unit5 period 1
2017届高考英语（重庆专用）二轮精练：必修2 unit5 period 2
2017届高考英语（重庆专用）二轮精练：必修2 unit2 period 1
2017届高考英语（重庆专用）二轮精练：必修3 unit4 Astronomy the science of the stars单元测试
2017届高考英语（重庆专用）二轮精练：必修3 unit2 Healthy eating单元测试
2017届高考英语（重庆专用）二轮精练：必修3 unit3 period 2