my grandfather used to telling me stories when I was young.为什么用used to teiiin而不用used t0 tell
问题描述：
my grandfather used to telling me stories when I was young.为什么用used to teiiin而不用used t0 tell
答
be used to (doing)sth.习惯于做某事,后接名词,动名词,代词；而used t0 do ...被用来做某事