你好,同学,很高兴回答你的问题
正确答案：
Shall we have a picnic at the weekend?改为同义句
（ How / What ）（ about ）having a picnic at the weekend?
My parents often help me with my homework.改为同义句
My parents often（ help ）me ( do ) my homework.
单词：
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希望能帮到你,祝更上一层楼O(∩_∩)O
不明白请继续追问,可以详谈嘛(*^__^*)
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how about doing sth? 或what about doing sth? 是提意见的句子，意思是 做...怎么样？How/What about 也就是说填how about 或what about 都可以。