题目内容：

after all 和 only if 的用法每个举三个例子并请告诉我它们的用法,谢谢啦!

优质解答

after all 毕竟
. You should forgive him for his forgetfulness; after all, he is over seventy.
你应该原谅他的健忘症,毕竟他已经七十多岁了.

2. You should be charitable with him; he is a child after all.
你应该对他宽容些,毕竟他还是个孩子.
3 Don't blame him for breaking that vase; after all he is a child.
别怪他打碎那个花瓶, 他毕竟是小孩子嘛.
only if:
只有当(只是在...的时候)
1. 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.

2. A compound proposition that has components joined by the word and or its symbol and is true only if both or all the components are true.
综合命题由和或其符号所连接的子句组成的复合命题,只有当所有子句为真时,该句才为真

3. 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.