经验分享
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What are的过去式？
what was ， what's 是 what is 的缩写， is 过去式是was are的过去式：were； are的过去分词：been； were v. 是，在（are的过去式）。 been v. 是，有（be的过去分词）。 what是疑问词，不是动词，所以没过去式这一说，只有动词才有过去式 What是特殊疑问词，不是动... -
SAT语法练习题之the best choice
Part or all of the following sentence is underlined; beneath the sentence are five ways of phrasing the underlined material. Select the option that produces the best sentence. If youthink the original phrasing produces a bett... -
动词现在分词ing分词作状语
ing 分词作状语 ing分词作状语时，它的逻辑主语就是整个句子的主语 （1）ing分词短语作时间状语 Seeing those pictures, she remembered her childhood. 看到那些画，他想起了她的童年。 （2）ing分词短语作原因状语，相当于一个原因状语从句。如： Not knowing his address, I can’t send this book to ...