building(复数形式)——buildings
bridges(单数形式) ——bridge
there are not(缩略形式)——there aren't
解析:
(一)
可数名词单数变复数的常见规则如下:
1、一般情况下,词尾加“s”
如:book——books
pen——pens
ruler——rulers
2、以“s、x、ch、sh”结尾的可数名词,词尾加es
如:bus——buses
box——boxes
peach——peaches
fish——fishes
3、以“辅音+y”结尾,变“y”为“ies”
如:city——cities
baby——babies
butterfly——butterflies
4、以“f”或“fe”结尾,变“f”或“fe”为“ves”
如:leaf——leaves
knife——knives
(二)可数名词复数变单数规则,正好与单数变复数规则相反,不再赘述。
(三)常见英语词组缩写形式如下:
is not——ins't
are not——aren't
it is——it's
I am——I'm
he is——he's
she is——she's
they are——they're
they have——they've
he has——he's
she has——she's
注意,其中he is——he's,she is——she's要和he is——he's,she is——she's区别开来(表示“有”概念时,'s=has;表示“是”概念时,'s =has)
如:
He's/She's got a new bag.他/她有一个新书包。(He's = He has, She's =She has)
He's/She's a good student.他/她是个好学生。(He's = He is, She's =She is)