如果你非要……

if you want───如果你想

if you must know───如果你一定要知道

if you like───如果你愿意；如果你喜欢的话

if you please───请；对不起

iron rust───[材]铁锈

of yours───属于你（们）的；你（们）的

if you ask me───我认为；依我说

If you must be in the sunlight, use the strongest sunscreen you can get.───如果你一定要呆在阳光下的话，就用你能买到的最有效的防晒霜。

It's from my boyfriend, if you must know.───你一定要知道的话，这是我男朋友给的。

It scared the hell out of her, if you must know. And me, too.───这把她的魂都吓飞了，如果你一定要知道的话。而且我也被吓坏了。

This property can be used to determine if you must call an invoke method, which can be useful if you do not know what thread owns a control.───该属性可用于确定是否必须调用Invoke方法，当不知道什么线程拥有控件时这很有用。

When I said good bye Mrs. Scott took me by the hand and wept. "Why did you come to us, " she said, "if you must go so soon? "───当我告别的时候，司各特太太拉着我的手，哭泣着说：“既然你必须这么快就要离开，那你为什么还要到我们这儿来呢？”

If you must remark about someone's weight, do it in a way that shows you're trying to help. See how John does it with Modern English!───如果你确实想对某人的体重发表意见的话，一定要让别人感觉到你是想帮助他。看看John是怎样用现代美语表达的。

This type of storage is no guarantee against loss in a disaster but if you must evacuate it will be easy to carry with you.───这种方式不能确保应对灾难中的损失，但如果你必须被疏散，这个东西很容易随身携带。

"If you must go outside make sure you are accompanied and that you and your company walk as far away from men as possible, " she said.───祖母又说：“如果你必须出门要确保有个人陪着你，而且你和你的同伴要走的离男人们越远越好”。

If you must use hyperlinks, add them to the bottom of a paragraph or to the navigation menus of your site.───如果你必须使用超级连接，请在语句的末尾或在导航菜单上添加。

Well, if you must know, I'm thirty-six.

'Could I have a word?'--'Oh dear, if you must.'.

If you must be in the sunlight, use the strongest filter cream you can get.

If you must know , I was with James last night .

If you must smoke, please go outside.

All right, come along, if you must.

It's from my boyfriend, if you must know.

If you must spit at all, please spit in the bucket provided.

"If you must, " came the gruff reply.