keep
keep to do和keep doing的区别？
to do和keep doing的区别？
很明确的告诉你:没有keep to do的结构，
keep 后接doing 的结构.keep doing sth.保持，一直做某事
如:keep reading，一直在阅读.
没有keep to do 的结构，但是有keep to sth.的结构.保持，坚持，这个to 是介词.如keep to your idea.相当于stick to。
stick to后面接动词什么形式？
stick to doing sth.意思是坚持做某事，这里的to是介词，后面跟动词的ing形式。比如：Reporters should stick to investigating the facts.记者应坚持调查事实。
以上仅供参考，希望对你有所帮助！
介词to作后置定语的名词？
give rise to 引起
look forward to 盼望
pay attention to 注意
lead to通向 see to 负责
access to 接近(某地的)方法
be addicted to 沉溺于… 对…上瘾
according to 根据
contribute to 为…作贡献
pay attention to doing注意
admit / confess to doing 承认
approach to doing ……的方法
be used / accustomed to doing习惯于
be addicted / given to doing 沉溺于
get down to doing 着手做
look forward to doing 期待
devote / dedicate oneself to献身于
help oneself to doing 自便；随意做
feel up to doing 能胜任
make contributions to doing对……做贡献
prefer doing to doing相比（后者）更喜欢（前者）
when it comes to doing 当提到
stick to doing坚持
see to doing照顾；照料