By next sunday she _____(stay) with us for three weeks.(适当时态填空).请告诉我填什么,并且说明原貌似全错,会的才来,

问题描述:

By next sunday she _____(stay) with us for three weeks.(适当时态填空).请告诉我填什么,并且说明原
貌似全错,会的才来,

1.答案:will have stayed.
2.
1)“by + 某个时刻”意思是“到...为止”,表明句子应该含有完成时态;
2)而next Sunday又表明句子应该含有将来时;
3)所以以上两个时态相结合的话,则该句必须使用将来完成时,即will have stayed.