Have you sent thank-you notes to the relatives from _ _ you received gifts?Have you sent thank-you notes to the relatives from _ _ you received gifts? 为什么不填that ,填whom
问题描述：
Have you sent thank-you notes to the relatives from _ _ you received gifts?
Have you sent thank-you notes to the relatives from _ _ you received gifts?
为什么不填that ,填whom
答
from 后面接的是宾语从句，这些笔记来自你的亲戚，如果用that的话，就要直接跟在relatives 后面
答
语法中介词提前要用whom
答
因为这里需要指代的是 relatives,亲戚们
from 是要和 receive 连在一起理解
答
介词后面只能用疑问词，不能用that