Unit1
by + Ving
have/has done已经做某事
V+adv(副词）
have/has been doing(现在完成进行时）
not…at all一点也不
be+adj（形容词）
end up doing sth（结束做某事）
talk to/with sb.与某人交谈
talk about sth.谈论某事
Why don't you=Why not+V原
practice doing sth.练习做某事
realize=get to know
to do sth.
be afraid｛of doing sth.｝可互换（害怕做某事） of doing sth.害怕某事
be afraid｛that从句
go out alone单独,出去
decide to do sth.决定做某事
.