where are you going?what are you doing?

问题描述:

where are you going?what are you doing?
where are you going?我理解它为be going to一般将来时的疑问句形式.
我回答:I am going shopping.或者I am going to shop.
what are you doing?我理解它为be+Ving现在进行时的疑问句形式.
我回答:I am doing shopping.或者I am doing to shop.
这些句子中的动名词和不定式这样互换有错误么?
因为不定式to shop等于动名词shopping.我是这么换的.

不对,不能互换,而且I am doing shopping和I am doing to shop的回答都是错误的,what are you doing?的意思就是你要去做什么,回答是我要去买东西,那因为的去买东西的词组不就是go shopping吗?在此处是一般将来时所以...