11.11 用于现在完成时的句型 1）It is the first / second time…. that…结构中的从句部分，用现在完成时。 It is the first time that I have visited the city. It was the third time that the boy had been late.2）This is the… that…结构，…...

11.6 be to和be going to be to 表示客观安排或受人指示而做某事。 be going to 表示主观的打算或计划。 I am to play football tomorrow afternoon. (客观安排) I'm going to play football tomorrow afternoon. (主观安排) ...

11.1 一般现在时的用法 1) 经常性或习惯性的动作，常与表示频腮度的时间状语连用。 时间状语： every…, sometimes, at…, on Sunday I leave home for school at 7 every morning.2) 客观真理，客观存在，科学事实。 The earth moves around the s…...

11. 动词的时态 11.1 一般现在时的用法1) 经常性或习惯性的动作，常与表示频腮度的时间状语连用。 时间状语： every…, sometimes, at…, on Sunday I leave home for school at 7 every morning.2) 客观真理，客观存在，科学事实。 The earth moves around…...

11.24 一般现在时代替完成时 1) 有些动词用一般现在时代替完成时：hear, tell, learn, write , understand, forget, know, find , say, remember. I hear (= have heard) he will go to London. I forget (=have forgotten) how old he is.2) 句型 " I…...

11.19 不用进行时的动词 1) 事实状态的动词have, belong, possess, cost, owe, exist, include, contain, matter, weigh, measure, continue I have two brothers. This house belongs to my sister. 2) 心理状态的动词Know, realize, think see, b…...

11.13 since的四种用法 1) since +过去一个时间点 (如具体的年、月、日期、钟点、1980, last month, half past six)。 I have been here since 1989. 2) since +一段时间+ ago I have been here since five months ago. 3) since +从句 Grea…...

11.8 用现在进行时表示将来 意为："意图"、"打算"、"安排"、常用于人。常用词为 come, go, start, arrive, leave, stay等。 I'm leaving tomorrow. Are you staying here till next week? ...

11.3 used to / be used to used to + do："过去常常"表示过去习惯性的动作或状态，但如今已不存在。 Mother used not to be so forgetful. Scarf used to take a walk. (过去常常散步) be used to + doing： 对……已感到习惯，或"习惯于"，…...

11.26 现在进行时代替将来时 1) 表示即将发生的或预定中计划好的活动。 Are you staying with us this weekend? 这周和我们一起度周末吗? We are leaving soon. 我们马上就走。 2) 渐变动词，如：get, run, grow, become, begin及die。 He is d…...