牛津深圳版八年级英语上册 Unit 6 Ancient stories P87 The present perfect tense with since and for 课件 (共20张PPT)

Unit 6 Oxford English Module 3 Culture and history Period 5 Grammar Ancient stories * 现在完成时（用法一）：表示过去发生并且已经完成的动作对现在造成的影响或带来的结果。 has/have done something 1 Revision The present perfect tense 构成 : have/ has+done 现在完成时（用法二） 表示：过去某一时间开始，持续发展到现在 并可能继续持续下去的动作或存在的状态. 2 Grammar A The present perfect tense with since and for have/has +done ↗ ↘ for+时间段 since+时间点 3 Grammar A The present perfect tense with since and for 用于表示动作持续了多长时间，用于现在完成时 态时，应与一段时间连用。 for for + a period of time My father has given up smoking for two years. since + a point in time My father has given up smoking since 2012. Grammar A The present perfect tense with since and for 4 since “自从”，用来说明动作起始时间，用于现在完成时态时，应与时间点连用。 5 Grammar A The present perfect tense with since and for since +过去的时间点 +过去的动作 +一段时间+ago My father has given up smoking since two years ago. My father has given up smoking since I was born. Read and complete 1.Our teacher has studied Japanese _________ three years. 2.I’ve known him ___