1．表示时间. -What time is it?几点钟? -It's ten．十点钟. It's summer in Australia now．现在澳大利亚是夏天. 特别注意it用于表示时间时还常见于以下三个句型中: to do sth．／It's time for sth． “是该干--的时间了 .“到--的时候了 It's time for supper／to have supper．是吃晚饭的时候了. I think it's time for us to start the lesson now．我想现在是我们开始上课的时候了. (2)It is ／has been +时间段+since +一般过去时 It was +时间段+since+过去完成时 “自从--以来已过了-- It has been two weeks since we met last．自从我们上次相遇以来.两个星期过去了. It's three years since he came here．＝It has been three years since he came here． ＝He has been here for three years．他到这里已经三年了. 注意:It is/has been+时间段+ since -continuous v-ed 某动作已有多长时间不发生了 It's 10 years that he lived here time that sb. did sth. 该某人做某事的时候了(这是一个虚拟语气.表示对现在事实相反的虚拟语气) It’s high time that we went to school. (4)It is the x-th time sb have done sth It was the x-th time that sb had done sth这是某人第几次做某事了 It's the third time that he has failed the driving test. It was the second time that he had seen the film. +时间段+before +一般过去时 “过(不)了多长时间某动作发生了 It will be +时间段+before+一般现在时 “过多长时间才- It was not long before they arrived. It will be several years before we meet again. 【查看更多】
