even if与even though,even的区别

even if=even though是即使的意思，even是甚至的意思

even if 与 even though
这两个词组大致意思相当,但强调的侧重有所不同.
even if与even though的区别：
even if一般引导的是把握不大或假设的事情,
even though引出的是事实.
如：Even if we achieve great success in our work,we should not be proud.
即使我们在工作中取得了巨大成绩,也不应该自满.
Even though he was late,he was not criticized by the teacher．
虽然他晚了,可他并没有受到老师的批评.
Even though he knows it,he'll not let out the secret.
（他知道这个秘密）.
Even if he knows it,he'll not let out the secret.
（不确定他是否知道这个秘密）.
though 常表示一些已经确定的消息,
而if由它本身所带的“如果”的含义,表示了一种对假设信息的不确定.
even是一个常用的副词.该词用法较广,位置较活.现将其用法归纳如下：
一、用在比较级前,加强语气,表示程度.具有still,yet,much的意义,汉语意思为“(比……)更,还要”
这种句型意味着两个被比事物都是怎样,而其中的一个更为怎样.如：This dictionary is even more useful than that one.这本词典比那本更为有用.
This time he did it even better.这次他做得还要好.
二、放在它所强调的词、短语或从句前,用来加强语气,表示“即使,甚至连……都”之意
1.强调名词.Even a child can understand the book.即使小孩也能看懂那本书.
Even the movements of the heart and lungs are greatly reduced.(冬眠动物)甚至连心脏和肺部的运动也大大减少了.
2.强调形容词.Bamboo is so strong that people use it to build houses and even high bridges over rivers.竹子很结实,人们用它建造房屋,甚至在河上架大桥.
The chain was even worthy of the gold watch.这条表链甚至配得上那只金表.
3.强调副词.I have explained everything,but even now she doesn′t understand.我已做了全面的解释,甚至到现在她还不明白.
Even then he would not admit his mistake.甚至那时他还不承认错误.
4.强调数词.Then the need to turn to a dictionary or a reference book,perhaps ten or even twenty times a page,tires him out.后来,每读一页需要查阅词典或参考书10次甚至20次,这就使他疲惫不堪.
5.强调动词.I even forget what my mother said.我连母亲的话都忘了.
I can′t even remember the name of that old friend of mine.我甚至连那位老朋友的名字都记不起来.
6.强调介词短语.He was afraid to go out,even for food.他不敢出门,甚至连食物都不敢去找.
With that man′s permission and even with his help,he seized her and took her away.在那个人的许可下,甚至在他的帮助下,他把她抓走了.
7.强调从句.It happened even as we expected.事情正如我们所预料的那样发生了.
从以上各例可以看出,even的用法不仅广泛而且位置也较灵活.大体上说,它可位于句首,也可位于句中或句末.但是,even在句中的位置不同,全句的意思或重点也有所不同.一般来说,even的位置应靠近它所强调的词语和短语.例如：
Even John doesn′t go out in the summer(so certainly nobody else does).即使约翰夏天也不外出(所以别人也不一定外出.)
John doesn′t go out in the summer(so he certainly does nothing else).约翰夏天甚至连家门都不出(所以他一定不做别的什么事情.)