Only if的用法是什么?

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Only if的用法是什么?
Only if的用法是什么?

Only if的用法是什么?
主句可以倒装.但不绝对!
Only if 条件从句在前,中间无逗号时主句要倒装!

Only if you have interested in learning,you will learn well. 是对的!
You will learn well only if you have interested in learning. 是对的!

Only if you have interested in learning will you learn it well.主句倒装,也是对的!

主句要倒装

Only if I get a job will I have enough money to go to school.
我只有找到了工作才有足够的钱上学.
Only if a teacher has given permission is a student allowed to enter this room.
只有得到教师的允许,学生才可以进这间屋.
Only if presented in this way can your idea get over to the audience.
只有用这样的方式提出来,你的意思才能使听从明白.

主句不用倒装
Our prices are in force only if you order by return mail.
我方价格仅以你方速复我订货,才有效.
The company will succeed only if it have sufficient backing.
只有当该公司获得足够的资助,它才会成功.
I can buy the house only if a mortgage for 2000 dollars is available.
只有拿到两千美元的抵押贷款,我才买得起那栋房子.
You can make progress only if you are modest.
惟虚心乃能进步.
Accept a drink only if you really want one.
只有在你真正想喝酒的情况下,才能接受一杯.
只有在你真正想喝酒的情况下,才能接受一杯.

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