what are they usually do?改错改错,并说理由.快呀,明天就要交!又快又对,我加分!

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what are they usually do?改错改错,并说理由.快呀,明天就要交!又快又对,我加分!
what are they usually do?改错
改错,并说理由.快呀,明天就要交!
又快又对,我加分!

what are they usually do?改错改错,并说理由.快呀,明天就要交!又快又对,我加分!
应该是
what are they doing?或者what do they usually do?

do-->doing
are doing 现在分词

应该是are换成do,问的是他经常做什么，are是be动词，不能和动词原型一起用，根据usually“经常”，应该用一般现在时，而不是用现在进行时。

肯定应该改成：
what do they usually do?
因为usually这个副词表示的就是一般现在时，意思是通常，所以只能用一般现在时的谓语来表示。把do 改成doing是错的，因为usually不能用在现在进行时的时态中。
类似的副词还有 often

What do people usuall do at Easter? what are they What are they? What are they doing? what are they doing? what nice they are What are they What are they? What are they? What islands are they? what are they! what great they are! what are they are pens What do people usuall do at Easter?英语回答 What do people usuall do at Easter?英语回答 what colour are they可以变成what are they colour? What colours are they?与 What colour are they? What are they( )(do)now