请说明下语法或原因
问题描述：
请说明下语法或原因
the boy wanted to ride his bike ,but his mother told him )我觉得没答案啊这题
a:not to
b:not to do
c:not do it
d:do not to
she can't help )the house because she's busy making a cake
a:to clean
b:cleaning
c:to cleaned
d:to cleaning
the thief stole into the house ,)by the owner
a:only to be caught
b:only being caught
c:having been caught
d:caught
)a teacher,we should set a good example to students
a:being
b:having
c:to be
d:to have been
答
1,a tell sb (not)to do,这里 do是可以省略的
2.a can't help to do 是不能帮忙做某事,如果加doing则是情不自禁做某事；本题是前者.
3.a.不定式表示结果,发生主句谓语之后.
4.a .作为一名老师我们应该为学生树立好的榜样.现在分词做状语,和主语有主谓的关系.b是有的意思,c是表示将来.d 是完成式强调发生在主句谓语之前,一般也不放在句首