什么情况用is什么情况用have,is to

什么情况用is什么情况用have,is to

6. The key is yellow. 钥匙是黄色的。The是定冠词，表示“这(个),那(个),这些，那些”，在元音音素前读/ ði: /,在辅音音素前读/ ðə /。它可以用在名词前，表示特指说话双方都知道Flash version 9,0 or greater is required You have no flash plugin installed Download latest version fromhere 行李准备建议1)衣服，建议携带长袖薄款防晒衣做好防晒准

一、什么情况用is什么情况用has

1.have,has 做实意动词表示“有”，做助动词常用于现在完成时eg.I have some books.我有一些书. She has an apple.她有一个苹果. They have bam/is/are均为be动词，陈述句中用在主语之后，名词、形容词或副词之前. have/has用法较多：(1)作使役动词，比如.i have him read the book.我让他读书.这里have表示使某人做什么

二、什么情况用is什么情况用do

但在大多数情况下，特别是在口语中，常常用形式主语it来代替不定式作主语，而把不定式移到句子后面去，这样使句子显得较平衡。上述句子可以改为：It is our duty to help poor peo②will do.三、否定句：在be动词(am, is, are)l后加not或情态动词will后加not成won’t。例如：I’m going to have a picnic this afternoon.→ I’m not going

三、什么情况用is什么情况用are

inittab is no longer used when using systemd. ADDING CONFIGURATION HERE WILL HAVE NO EFFECT ON YOUR SYSTEM. Ctrl-Alt-Delete is handled by /usr/lib/systemd/sy1.have,has 做实意动词表示“有”，做助动词常用于现在完成时eg.I have some books.我有一些书。She has an apple.她有一个苹果。They have been to Beijing twi

四、什么情况用is什么情况用was

如果他有什么意见的话，我们还可以对计划稍加修改。6. Is there any way of ensuring we'll have enough time for our talks? 日常商务英语口语Part 1状况1:第一次和客户见面A:您好吗？Wise先生，回答示范2: Well, my hometown is a small town which you probably have never heard of. The name of the town is Dehui, which means “good moral”in Chi