句型转换。
1.I want a hamburger.(就划线部分提问)
______ ______ you want?
2.There are some boats on the lake. (改为否定句)
There ______ ______ boats on the lake.
3.Your mum gave me a pencil .(改为同义句)
Your mum gave a pencil _____ ______ .
4.Sam can ride a bike.(改为一般疑问句)
________ ________ ride a bike?
5.I’m running now.(用yesterday代替now)
I ______ yesterday.
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