I'm sure I locked the door before leaving.（我确定我在离开前锁了门。）

She is sure to pass the exam with her hard work.（凭借她的努力学习，她肯定能通过考试。）

Are you sure you want to make this decision?（你确定你想做出这个决定吗？） He said he was sure of his victory in the competition.（他说他确信自己能在比赛中获胜。）

We are sure that we can finish this project on time.（我们肯定我们能按时完成这个项目。）

Sure, I'd love to go to the party with you.（当然，我很乐意和你一起去参加派对。）

Is she sure about the time of the meeting?（她确定会议的时间吗？） They are sure to arrive at the airport before noon.（他们肯定会在中午之前到达机场。）

I'm not sure if it will rain tomorrow.（我不确定明天是否会下雨。）

Sure, you can borrow my book if you need it.（当然，如果你需要的话，你可以借我的书。）

The teacher is sure that the students understand the lesson.（老师确信学生们理解了这堂课。）

He made sure all the lights were off before going to bed.（他在睡觉前确保所有的灯都关了。）

Are you sure this is the right way to the museum?（你确定这是去博物馆的正确路线吗？） She is sure of her ability to handle this task.（她确信自己有能力处理这项任务。）

We made sure to bring enough food for the picnic.（我们确保为野餐带了足够的食物。）

Sure, I'll help you with your homework later.（当然，我稍后会帮你做作业。）

Is he sure where the keys are?（他确定钥匙在哪里吗？） They are sure to enjoy the movie tonight.（他们肯定会喜欢今晚的电影。）

I'm not sure which dress to choose for the party.（我不确定该选哪条裙子去参加派对。）

Sure, we can meet at the coffee shop as planned.（当然，我们可以按计划在咖啡店见面。

）