1、I can tell you the truth on condition that you promise to keep a secret.我可以告诉你真相，条件是你答应保密。

2、You can go swimming on condition (that) you dont go too far from the river bank.你只有在不远离河岸的条件下才可以下水游泳。

3、Supposing it rains,shall we continue the sports meeting?倘若下雨，我们的运动会还要继续举行吗?

4、Supposing anything should go wrong,what would you do then?假如出了什么问题，你准备怎么对付?

5、He will sign the contract provided we offer more favorable terms.如果我们提出更优惠的条件，他就会在合同上签字。

6、He wont be against us in the meeting provided that we ask for his advice in advance.如果我们提前征求一下他的意见，他就不会在会上反对我们。

7、But for the rain,we should have a pleasant journey.要不是下雨，我们的旅行肯定会很愉快。

8、Without your help,we should not have finished in time.没有你的帮忙，我们肯定不能及时完成任务

9、So long as you’re happy,it doesn’t matter what you do.只要你高兴，你做什么都没有关系。

10、You may borrow my book as long as you keep it clean.只要你保持书的清洁，你就可以把我的书借去。

11、Take your umbrella in case it rains.带着你的伞吧，以防下雨。