一般疑问句
1．将陈述句变为一般疑问句时,如句中有be 动词（am is are …）时,可直接将它们提至主语前.如主语为第一人称,应将其改为第二人称.如：
I'm in Class 2Grade 1． →
Are you in Class 2Grade 1?
We're watching TV． →
Are you watching TV?
2．陈述句中有情态动词（can may must …）时,也可直接将它们提至主语前,即可成为一般疑问句.如：
He can swim now． →
Can he swim now?
The children may come with us． → May the children come with us?
3．陈述句中只有一个实义动词作谓语且其时态为一般现在时,变为一般疑问句时要在句首加do或does 主语后的实义动词用原形.如：
I like these animals． →
Do you like these animals?
She wants to go to the movies． → Does she want to go to the movies?
否定句
有be的就改成be+not
没有Be的就在主语的前面+do not或does not
把肯定句改为疑问句就是有be的就把be提到前面来,
没有be的就在句首加do或 does