他们如何做的英语

what do they do 或者 what is their job

What are they doing?

What is he doing? I 是第一人称用am。you 是第二人称用are。 he/ she/ it都是第三人称，全都用is。所以是:What am I doing?What are you doing?What is he/she/it doing? 另外所有的非人类的动物，物品之类的也都用is。但是如果第三人称是非复数，比如他们，她们，或一群动物，就要用are。所以是：What are they doing?What are those boys doing?What are these dogs doing?

How can they do this

How can they do like this？

how can they do this

What did they do?

英语：How can they do this？日语：彼らはどのようにこのようにすることができます