背一些+ing的含有to的短语：（初中英语常见的to后+ing的词组）
stick to doing sth.
pay attetion to doing sth.
make a countribution to doing sth.
be/get used to doing sth.
prefer doing to doing
英语-to后面什么时候加do什么时候加doing?
背一些+ing的含有to的短语：（初中英语常见的to后+ing的词组）
stick to doing sth.
pay attetion to doing sth.
make a countribution to doing sth.
be/get used to doing sth.
prefer doing to doing