“不需要”的英语可以翻译为：[法] non-essential，have no use for ...

要不是你，我们可能已经被他们甩掉了。But for you, they might have given us the slip.要不是对此深信不疑，他不会说这样的话。He wouldn't say this if it weren't the gospel truth.要不是下雨,我们会有一次愉快的旅行.But for the rain we should have had a pleasant journey....

“要事”的英语可以翻译为：[医]matter ...

“强要”的英语可以翻译为：extort，compelled ...

“想要”的拼音为：xiǎng yào...

把它扔进邮筒，要不然就让你的秘书发份传真。Pop it in the post, or get your secretary to fax it.除非我们到来，要不然那间小木屋一直都是空的。The log cabin stayed empty, except when we came.别出声，要不然我们都会被抓住的。Keep quiet or we'll all get nicked....

“还要”的英语可以翻译为：still ...

不要紧，他仍是众人心目中的英雄。No matter, he remained the hero of the crowds.不要紧，别哭了。It's all right. Don't cry.不要紧, 我相信你下一次一定能做得好些的.Never mind, next time I'm sure you can do better....