be attached to加do吗,可直接加sth吗
问题描述：
be attached to加do吗,可直接加sth吗
答
to是动词不定式，应加do
若加sth.
应加在 to do之后
为be attached to do sth.
答
to是介词，后面加doing或sth
答
be attached to doing sth
be attached to sth
答
To是介词....do应加ing