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时态和语态 一般 进行 完成 完成进行 现在 write, writes am/is/are writing have/has written have/has been writing 过去 wrote was/were writing had written had been writing 将来 shall/will write shall/will be writing shall/will have written shall/will have been writing 过去将来 should/would write should/would be writing should/would have written should/would have been writing （1） ①表示客观事实或普通真理（）Water ______ (boil) at 100oC. ②表示现状、性质、状态时多用系动词或状态动词；表示经常或习惯性的动作，多用动作动词，且常与表频率的时间状语always, every time, now and then, occasionally, often, seldom, sometimes, usually 等连用。 Months ago we sailed ten thousand miles across the open sea, which _____ the Pacific, and we met no storm. A. was called B. is called C. had been called D. has been called ③表示知觉、态度、感情、某种抽象的关系或概念的词常用一般现在时：see, hear, smelltaste、feel、notice、agree、believe、like、hate、want、think、belong seem等。All the students here ____(belong) to No.1 Middle School. ④现在时态表示将来时A. 用现在时表示将来时往往出现在下列状语从句中：if, unless, even if等引导的条件状语从句；when, before, after, once, until, till, as soon as(the moment, immediately)等引导的时间状语从句；no matter what/who/which/when/where/how或whatever/whoever/whichever/whenever/ wherever /however引导的让步状语从句。（有时也但要注意由if 引导的条件状语从句中可以用shall或will表“意愿”，但不表示时态。If you _______( accept) my invitation and come to our party, my family _____________( please). | 
