什么情况下主语可以和助动词is合写

问题描述

精选答案

is是be的第三人称单数形式。

它的使用情况表现在两大方面，一是做“助动词”的情况，另一个是做“连系动词”的情况。一、在做助动词的情况下用is1. 后面跟现在分词，构成现在进行时。例如，He is reading.2. 后面跟过去分词，构成一般现在时的被动语态。例如，Football is played all over the world.3. 后面跟不定式，往往表示下列各种情况的动作：★未来的安排或计划。如，The delegation is to leave for Shanghai tomorrow.★必要或命令或问对方的意志。如，What is to be done ★“可能”，与can或may相仿。如，I am not sure whether he is to turn up tonight.二、在做连系动词的情况下用is连系动词is在句中做谓语动词，后面跟表语。如：He is a great doctor.She is a bit shy.The story is interesting.The boy is bored

其他回答

建筑造就安全

以下几种情况下，is前面的词和is合写成一个词，其实没什么规律可言，看多了，用多了，就记住了。

What is your name What's your name

It is my book.It's my book.

There is a pen on the desk. There's a pen on the desk.

Where is my school bag Where's my school bag

Who is on the busWho's on the bus