2019中考英语专题复习--介词.pptVIP

for和 since的区别 1.He has been a teacher ___ 10 years. 2.____ 2000, Tom has studied English. 3.Jack and John have been away from Shanghai ______ five years ago. for Since since since: (自从) 后加时间点 for: 后加时间段 3. for + 时段 since + 时段 + ago since + 时间点 since + 一般过去时句子 常用于现在完成时 1.He came here __ 1992, and he has lived here ___ 1992. A. in, for B. in , since C. since, since 2.I have known Li Lei __ over five years. A. in B. since C. for 3. It has been three years since he __ here. A. come B. came C. comes 4. The old man has been away ___ two years ago. A. in B. since C. for 4. before 在……之前 (后接时间点或从句） 常用于一般将来时和过去完成时 by 到……时为止,不迟于……(=not later than) 1.He won’t come back ___ five . A. before B. after C. by 2.The work must be finished __ Friday. A. at B. by C. after 3.We had three meetings ___ last Friday. A. in B. before C. by 表示持续一段时间用介词 : 表示“自……以来”,从过去某一时刻到现在,用介词 ,用于现在完成时。 表示从一点时间到另一点时间的一个阶段用介词 。 表示“在……的期间”要用介词 , 表示在特定的时间里。 表示某动作或者状态延续到某一时间终止,用介词 。 Conclusion: for for＋段时间 since from … to … during till / until until可用于句首,而till通常不用于句首, 不可延续的则用 not… until 二.表示地点和方位的介词 1.on 在……的上面,与表面接触 over 在……的正上方,不接触表面 under 在……下面(是on, over的反义词) 1.Look!There is a bridge __the river. A. on B. over C. above 2.Can you see the egg ___ the plate? A. on B. in C. over 3.The light__ us is very bright. A. over B. under C. on 2. above 在……上方 below 在……下方,是above的反义词 1. The temperature will fall__ zero at night. A. below B. above C. over 2.Suddenly there is a loud voice ___ the tree. A. below B. above C. on 3.There is a clock on the wall. It’s ___ the blackboard. A. on B. in C. above in front of 是在物体 的前面 例如: 教室前有个花园。