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 toshe can't help )the house because she's busy making a cakea:to cleanb:cleaningc:to cleanedd:to cleaningthe thief stole into the house ,)by the ownera:only to be caught b:only being caughtc:having been caughtd:caught)a teacher,we should set a good example to studentsa:beingb:havingc:to bed:to have been

全选A

D加上do表强调
B习惯用法help doing
D前后一致
Abeing a xxx 作为一个xxx

a not to do it(it 指先前的ride the bike 可省)所以是not to do
a can't help 根据后句 做蛋糕太忙了 所以她不能帮忙打扫卫生 所以是 can't help to clean
d stole 是过去时 有选项看 A是表示 to be 将要 being caught表示现在正被抓住 C 表示已经正被抓住了 D 是过去表被动 主语是the thief 后句就省略了 所以是the thief caught by the owner
a being 是作为现在 having 少系动词 tobe 将要 to have been 这个...
由should 可知 由BEING 分词引导句子 意思就对了

a，这是把not to do it中的do it 省略了
a，这里并不是can't help忍不住做某事的意思，而是不能帮助做某事了，所以要接to do sth
a，表示结果被主人抓住了，因为be caught是发生在stole into 之后，所以要用表示将来意思的不定式，只能选a
a，be与句子主语是主动关系，来说明we 的身份，所以用ing形式即可

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