南京2013中考分数线:都帮忙做一下

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They may not be difficult,such as running or jumping.改同义句

____They____difficult,such as running or jumping.
填什么?(解释原因!)谢谢!

Maybe;aren't
1.may be的同义词为maybe(通常用在句首).
2.因为主语为they,故be的形式应为are.
3.此句为否定句,故应用否定式.即aren't.