陈述句、疑问句是英语中两个基本而又重要的句型。如何改陈述句为
一般疑问句是很多同学
头痛的问题。这里我提供一些方法供大家一起学习。
首先，把动词进行分类，习惯上我把动词分为四大类。
A类：be 动词。形式有is, am, are, was, were。
B类：
助动词。 will(
一般将来时助动词)+动词原形
would(一般过去时助动词)+动词原形
be(进行时助动词)+
现在分词have/has(
现在完成时助动词)+
过去分词had(
过去完成时助动词)+过去分词
be(
被动语态助动词) +过去分词
C类：
情态动词。主要有can, may, must, could, should等。
D类：实义动词，又称行为动词。实义动词种类、数量繁多，可记为除A类，B类，C类外的其它动词。
然后，根据动词的种类进行陈述句改一般疑问句。可分为两种情形。
第一种：把含有be 动词，助动词，情态动词的陈述句改为一般疑问句。基本方法是“一移三变”。
一移：把be 动词，助动词，情态动词移到句首。
三变：“一变”把陈述句主语的大写字母改为小写字母 （若主语是人名，大写不变）；“二变”把移到句首的动词的小写字母改为大写字母；“三变”把句号改为问号。
如：
He is a boy.
→ Is he a boy?
He will go to visit his friends.
→Will he go to visit his friends?
Tom is reading English .
→Is Tom reading English?
She has been to Beijing.
→Has she been to Beijing?
Many young trees were planted last year.
→Were many young trees planted last year?
Jim can sing.
→Can Jim sing?
第二种：把含有实义动词的陈述句改为一般疑问句。基本方法是“一加三变”。
一加：在陈述句句首加入Do(现在时且主语是第一人称、第二人称、复数,实义动词的形式为动词原形)/Does(现在时且主语是第三人称单数，实义动词的形式以-s或-es结尾)/Did(过去时，实义动词的形式通常以-ed结尾)。
三变：“一变”把陈述句主语的大写字母改为小写字母 （若主语是人名，大写不变）；“二变”把陈述句中的实义动词改为动词原形（若实义动词为动词原形保持不变）；“三变”把句号改为问号。
如：
They like English.
→Do they like English?
He likes English.
→Does he like English?
Tom planted a tree yesterday.
→Does Tom plant a tree yesterday?
He went to visit his grandparents yesterday.
→Did he go to visit his grandparents yesterday?
最后，不论改含有哪种动词的陈述句为一般疑问句，都要注意以下两种情况。
1.若主语为第一人称（I，me, we, us, my, our等），要改为第二人称(you,your之类)。
2.若陈述句中含有some或some构成的
不定代词，要把some改为any,把some构成的不定代词改为any构成的不定代词。
如：
We like English.
→Do you like English?
I have some books.
→Do you have any books?
I have something important to do.
→Do you have anything important to do?