such as ,like ,for example ,for instance ,as if 的区别和用法

such as ,like ,for example ,for instance ,as if 的区别和用法
如题 最好能有例句分析一下

1.
for example,such as和like都可用来举例,但用法有所不同.
for example作“例如”讲时,一般只以同类事物或人中的“一个”为例,作插入语,用逗号隔开,可置于句首、句中或句末.
For example,air is invisible.例如,空气是看不见的.
He,for example,is a good student.例如,他就是个好学生.
2.
such as也作为“例如”讲,用来列举同类人或事物中的几个例子.
Some of the European languages come from Latin,such as French,Italian and Spanish.
有些欧洲语言来源于拉丁语,例如,法语、意大利语和西班牙语.
Boys such as John and James are very friendly.像约翰和詹姆斯这样的男孩都很友好.
3.
like也常用来表示举例,可与such as互换.但such as用于举例可以分开使用,此时不可与like互换.
Some warm-blooded animals,like/such as the cat,the dog or the wolf,do not need to hibernate.一些温血动物,像猫、狗和狼都不需要冬眠.
He has several such reference books as dictionaries and handbooks.
他有几本像字典、手册之类的参考书.
4..
注 意 ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
使用such as来举例子,只能举出其中的一部分,一般不能全部举出.若全部举出,要改用namely（意为“即”）.
He knows four languages,namely Chinese,English,Russian and French.
他精通四门语言,即汉语、英语、俄语和法语.
5.
自我测试 ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
根据句意,用for example,such as或like填空.
1.Noise,,is a kind of pollution.
2.I like drinks tea and soda.
3.,my full name is James Allen Green.Green is my family name.
4.You can buy fruit here—oranges and bananas,.
5.There are several people interested,Mr Jones and Mr Simpson.
答 案：1.for example 2.like/such as 3.For example 4.for example 5.like
6.
for example ,for instance 是一样的用法
instance也有例子的意思
7.
as if 的用法
一、as if 从句的作用 1． 在look,seem 等系动词后引导表语从句.如：She looks as if she were ten years younger． 她看起来好像年轻了十岁.It seems as if our team is going to win． 看来我们队要胜了.2． 引导方式状语从句.如：She loves the boy as if she were his mother． 她爱这男孩,就好像她是他的母亲一样.The child talked to us as if he were a grownup． 那孩子跟我们谈起话来,像个成年人似的.二、as if 还可用于省略句中 如果as if 引导的从句是“主语＋系动词”结构,可省略主语和系动词,这样as if 后就只剩下名词、不定式、形容词（短语）、介词短语或分词.如：He acts as if （he was） a fool． 他做事像个傻子.Tom raised his hands as if （he was going） to say something． 汤姆举起手好像要说什么.She left the room hurriedly as if （she was）angry． 她匆忙离开房间好像生气的样子.三、as if 从句的语气及时态 1． as if 从句用陈述语气的情况.当说话者认为句子所述的是真实的或极有可能发生或存在的事实时.如：It sounds as if it is raining． 听起来像是在下雨.He talks as if he is drunk． 从他谈话的样子来看他是醉了.2． as if 从句用虚拟语气的情况.当说话人认为句子所述的是不真实的或极少有可能发生或存在的情况时.从句虚拟语气动词时态的形式如下：（1）如果从句表示与现在事实相反,谓语动词用一般过去时.如：You look as if you didn’ t care． 你看上去好像并不在乎.He talks as if he knew where she was． 他说话的样子,好像他知道她在哪里似的.（2）从句表示与过去事实相反,谓语动词用“had＋过去分词”.如：He talks about Rome as if he had been there before． 他说起罗马来好像他以前去过罗马似的.The girl listened as if she had been turned to stone． 那女孩倾听着,一动也不动,像已经变成了石头似的.（3）从句表示与将来事实相反,谓语动词用“would／could／might＋动词原形”.如：He opened his mouth as if he would say something． 他张开嘴好像要说什么.It looks as if it might snow． 看来好像要下雪了.
嘿嘿..