1.看句中有没有be动词（am、is、 are、 was、 were）、助动词（do、does、did、 have、 had）或情态动词（can、must、will、may等），如果有，将其提到句首，句末打上问号即可。 例：It was rainy yesterday. →Was it rainy yesterday?
Tom's father can play the piano. →Can Tom's father play the piano? I have finished my homework.→Have you finished your homework?
2.如果句中没有be动词、助动词或情态动词，则根据谓语动词的形式借助do的相应形式放
在句首。具体方法是：如果谓语动词是原形，则借do；如果谓语动词是一般现在时第三人称单数形式，则借does；如果谓语动词是过去式，则借did.需要注意的是，借does或
例：They go to school by bike. →Do they go to school by bike?
Bill gets up at 6:30 every day.→Does bill get up at 6:30 every day?
The students saw a film yesterday. →Did the students see a film yesterday?
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