I don't have a soccer ball,but my brother Alan does.为什么用does不用has、、、求解

I don't have a soccer ball,but my brother Alan does.为什么用does不用has、、、求解
I don't have a soccer ball,but my brother Alan does.为什么用does不用has、、、求解

I don't have a soccer ball,but my brother Alan does.为什么用does不用has、、、求解
因为前句中 have 是个实义动词,所以后面用 助动词 does
当have 作为助动词时,后面可以用 has
如：I haven't finished my homework,but my brother Alan has.
我还没有完成我的作业,但是我的哥哥艾伦完成了.
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