2.Did this tree fall by itself yesterday?
這棵大樹昨天自然倒下嗎?
用第二句有甚麼問題?
1.This is himself's fault.
2.This is his own fault.
這是他自己的過失。
用第一句有甚麼問題?
1. That student bought herself an English dictionary yesterday.
2. That student bought an English dictionary by herself yesterday.
那個學生昨日為她自己買了一本英文字典。
用第二句有甚麼問題?
更新1:
He let himself down slowly by means of a rope. 他用一条绳子滑下来。 adv. is?