They were proud that they had built the house themselves.这里的themselves为什么前面不加by 这样说得通吗?
问题描述：
They were proud that they had built the house themselves.这里的themselves为什么前面不加by 这样说得通吗?
答
1.作主语或宾语的同位语：主要起加强语气的作用，译作“亲自，本身，本人”。如：
Did you make the cake yourself?这蛋糕是你亲自做的吗?(yourself作主语you的同位语)
The work itself is easy.这工作本身很容易。(itself作主语the work的同位语)
Did you see Mr. Wang himself?你见过王先生本人吗？(himself作宾语Mr. Wang的同位语)
2.与by搭配
当反身代词与by搭配时，意为：单独地，没有人帮助的。例如：
（1）We must finish it all by ourselves.（我们必须全靠自己去完成。）
（2）He can swim all by himself.（他能独自一个人游泳。）
答
这里的by，可加可不加。再如：I do my homework（ by ）myself.
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答
要不要by 都行,句子意思一样.不加by ,themselves作同位语,加by ,by themselves在句子里作状语
by oneself 独自地,单独地
还可以说成
They were proud that they themselves had built the house