用作定语
▲～+n.
John is a very hopeful student.约翰是一位很有希望的学生。
She has a hopeful look on her face.她脸上露出充满希望的神色。
This is a hopeful news.这是个鼓舞人心的消息。
用作表语
▲S+be+～
The future seems not very hopeful.前途似乎不乐观。
▲S+be+～+prep.-phrase
We are hopeful about the future.我们对未来抱乐观态度。
He is hopeful of success in his new job.他相信会在新职业中取得成功。
Charles was hopeful of winning the prize.查尔斯对获奖充满希望。
▲S+be+～+that-clause
The police are hopeful that they will soon find the killer.警方相信很快就能找到凶手。
I'm hopeful that he'll arrive early.我希望他能早到。
