The girl is afraid__the dog.为什么是be afraid of而不是be afraid to?be afraid of doing sth.在什么情况下用？

The girl is where is the girl Where is the girl Is the girl happy? who is the girl? the girl is jumping. The girl is afraid.. The girl is talking The girl is cap is The girl is bad ,the girl is dangrous the girl ---- is 如：the girl in yellow is maria 》 how cute the girl is! the girl is small是什么意思 Who is the beautiful girl This Is The Girl 歌词 Every girl is the God! She is the right girl. the girl ( ) red is mary