那我就列举一些常用的吧.

　　1)系动词/助动词/情态动词的否定式的缩写

　　isnot-isn't

　　donot-don't

　　doesnot-doesn't

　　didnot-didn't

　　havenot-haven't

　　hasnot-hasn't

　　hadnot-hadn't

　　mustnot-mustn't

　　shouldnot-shouldn't

　　shallnot-shan't

　　willnot-won't

　　2)主语与系动词/助动词/情态动词的缩写

　　Iam-I'm

　　Youare-You're

　　Heis-He's

　　Sheis-She's

　　Weare-We're

　　Theyare-They're

　　Itis-It's

　　3)一些代词/介词/名词的缩写

　　something-sth.

　　somebody-sb.

　　without-w/o

　　telephone-tel.

　　please-pls.

　　quantity-q'ty

　　piece-pc

　　company-co.

　　limited-ltd.

　　onbehalfof-o/b