根据要求完成句子。
1. We can cross the road now. (改为否定句)
We _______ _______ _______ ______ now.
2. Sam can swim and skate. (对画线部分提问)
________ _______ Sam _______?
3. There are some children in the street. (改为一般疑问句)
___________ __________ _________ children in the street?.
4. Tom did his homework after school. (改为一般疑问句)
________ Tom ________ his homework after school?
5. Cross the road now! (改为否定句)
__________ __________ the road now!
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