来自刘凯文的问题
He__therefotwentyyearssincehecametothistown.a.hasworkedb.workedc.workd.haveworked为什么不选a,主语是第三人称谓语动词该用has吧?
He__therefotwentyyearssincehecametothistown.a.hasworkedb.workedc.workd.haveworked
为什么不选a,主语是第三人称谓语动词该用has吧?
1回答
2019-11-10 06:30