wascausedby的简单介绍
The railroad accident was caused by a horse stand
主要是by
a
horse
standing
on
the
rail(由一匹站在铁轨上的马引起)，这是一个介词短语，作为was
caused(被动语态)的状语。既然是短语不是句子，所以里面的stand就只能用动名词的形式，而不是动词原形。但如果用定语从句，那么就要用谓语动词了，不过句子就不那么简洁了,请对比:
The
railroad
accident
was
caused
by
a
horse
that
was
standing
on
the
rails.
英语句子结构分析.
"diability or death" 后面不需要 + “that" 也没有省略了that. 是prove 后省略了一个that
The editorial pointed that it is difficult for families to prove (that) their children's disability or death was caused by vaccination.
Prove 的此处用法为： prove (that ) + 从句， 如：This proves (that) I was right.
小孩的diability or death was caused by... was caused by 就是一个被动句：“他们孩子的残疾和死亡由疫苗接种造成“。
你说的句子中有三个动词， 是合逻辑的：1， The editorial pointed out that ＋从句1 －－－句子结构完整； 2。从句1 里面：it is difficult for sb. to do ----- 句子结构完整； 3。 从句1 中it is difficult for sb. to do， 这里的" DO" 为prove, 它的用法为 prove (that ) + 从句2， 从句2 为 sth. was caused by sth. ------ prove 后面的that 可以省略的， 句子结构完整。
the accident was caused by error
man-made
It's hard to come up with a better idea than this one
On average,there are more men who smoke than women
Our friends are all over the world.
句子的语法对吗？15% of total revenue was caused by
题主这个
with
的从句是可以的；不过以下几种写法可能更地道一点，题主可以参考一下：
1、15
percent
of
the
total
revenue
was
earned
by
council
tax,
business
rates
and
fuel
duty,
with
each
of
them
generating
5
percent.
2、15
percent
of
the
total
revenue
was
equally
generated
by
council
tax,
business
rates
and
fuel
duty.
(PS：在说赚利润的时候，revenue
前面的动词可以用
earn,
generate,
produce,
yield
或干脆用
get，但
cause
的意思是导致，“导致了利润”稍有不妥，可以再考虑考虑；
而且“百分比”尽量别用％符号，直接写
percent，一来占词数，二来更书面一点)