请教英语语法，高手请进！

1.
此句为主从复合句。
2.
主句：What
a
great
weight
定语从句：the
mother
felt
taken
off
her
mind
时间状语从句：the
moment
she
found
heo
lost
son
3.
分析：
1）主句：主句为一个以what引导的感叹句：What
a
great
weight
2）定语从句：the
mother
felt
taken
off
her
mind，修饰weight.
其中，被省略的关系代词代替先行词weight，在定语从句从句中充当felt的宾语。
定语从句的主语the
mother；
谓语felt；
宾语即被省略的关系代词；
宾语补足语taken
off
her
mind
3）时间状语从句：
the
moment是引导词，意思是“一...，（就...）”
主语she
谓语found
宾语her
lost
son

Oue
teacher
did
what
he
could
to
help
me
out.
这句话我这样划分
Oue
teacher主语
did
what
he
could
谓语
to
help
me
out.目的状语
疑惑：
did
what
he
could
是什么结构？
did谓语
what
he
could做什么？
could后面有的说省略了do
是吗？
求详细分析
答：其实你都知道了，说对了。what
he
could
（do)就是did的宾语（从句）。因为前面有动词did,所以后面从句中的这个do就可以省略了。有好事的教师发现有机可乘，有陷井好挖，常将这两个不搭界的could
to
help
挖空，放在一起出题。让目光短浅者上当：
Oue
teacher
did
what
he
______
me
out.
A.
could
help
B.
could
not
help
C.
can
help
D.
could
to
help
光看四个选项，D是最不可能，对吧？可答案偏就时它！

应该这么理解，is 前面省略了主语it,而it指代的应该是they creat supreme athletes making them faster and stronger这句话，另外还有一种可能就是is 本身用错了。

than is 是个句型，中间不存在主语

[these drugs.]I think .