he is very helpful at home变成一般疑问句
Is he very helpful at home?
用Yes或No作答的疑问句叫做一般疑问句。一般疑问句具有以下特点:
1. 以be动词、助动词或情态动词开头;
例:
Is your father a teacher?
Does Tom like animals?
Can Lucy speak French?
2. 往往读升调;
3. 译成汉语,都可以带上“吗”。
上面三句分别可以译为:
你父亲是老师吗?汤姆喜欢动物吗?露西会说法语吗?
看句中有没有
be动词(am,is,are,was、were),
助动词(do、does、did、have、had),
情态动词(can、must、will、may等),
如果有,就将其提到句首,再在句末打上问号。
例:
It is a computer.
→Is it a computer?
It was rainy yesterday.
→Was it rainy yesterday?
Lucy's father can play the computer.
→Can lucy's father play the computer?
I have finished my homework.
→Have you finished your homework?
改为一般疑问句:
Is he very helpful at home?
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