The
agreement has been signed by both sides.
协议已经由双方签字。
The videotapes were secretly recorded by the FBI. 这些录嫌带是联邦调查局秘密录制的。
被动语态后面的by短语是什么?
被动语态后面的by短语可分析为方式状语。
从语义上说,方式状语有多种语义类型,除了可以表示方式、手段外,也可以表示工具或施动等。被动语态后面的by短语可分析为表示施动的方式状语。
He got out of trouble by means of a clever trick. 他略施小计摆脱了麻烦。(方式)
Cut it with a knife. 用刀把它切开。(工具)
All supplies are transported by air. 补给品全部空运。(手段)
I was attacked by a dog. 我被一条狗袭击。(施动)