UC知道a strange sound was heard last night.为什么用was heard 而不直接用 heard 用
来源：百度知道 编辑：UC知道 时间：2024/06/04 10:12:59
被动语态，中间省略了by me
这样写你应该就能看懂了，A strange sound was heard by me last night.昨天晚上我听到了一种奇怪的声音。
被动语态
be动词后加过去完成时
被动语态,奇怪的声音是被人听到,而不是声音自己听到
a strange sound was heard last night.为什么用was heard 而不直接用 heard 用
a strange problem,help!!
a sound mind is a sound body??
at a sound是什么意思？
a sound ground是什么意思？
It had been a very strange day.
They found a strange book,___were difficult to understand
People are strange when you are a stranger．是什么意思？
为什么不能说feel a bit of strange
it is a strange that such a thing ______ in your school?