Use the singular (kind/sort) or plural (kinds/sorts) depending on the word you use before them.用单数（kind/sort）还是复数（kinds/sorts）取决于之前的用词：◆each/one/every kind of animal每一种/一种/每一种动物◆all/many/other sorts of animals所有/许多/其他种类的动物
Kind/sort of is followed by a singular or uncountable noun. * kind/sort of 后接单数名词或不可数名词：◆This kind of question often appears in the exam.这类问题在考试中经常出现。◆That sort of behaviour is not acceptable.那样的行为是不允许的。
Kinds/sorts of is followed by a plural or uncountable noun. * kinds/sorts of 后接复数名词或不可数名词：◆These kinds of questions often appear in the exam.这几类问题在考试中经常出现。◆These sorts of behaviour are not acceptable.这种行为是不允许的。
Other variations are possible but less common.亦可能有其他结构，只是较少见：◆These kinds of question often appear in the exam.此类问题在考试中经常出现。◆These sort of things don't happen in real life.这类事情在现实生活中不会发生。 (This example is very informal and is considered incorrect by some people.)此例很不正式，有些人认为不正确。
Note also that these examples are possible, especially in spoken English.另注意下列例句，尤其在口语中可能出现：◆The shelf was full of the sort of books I like to read.书架上摆满了我喜欢读的那种书。◆He faced the same kind of problems as his predecessor.他面临着与他的前任同样的问题。◆There are many different sorts of animal on the island.岛上有许多不同种类的动物。◆What kind of camera is this?这是哪种型号的照相机？◆What kind/kinds of cameras do you sell?你们卖哪种 / 哪些型号的照相机？◆There were three kinds of cakes/cake on the plate.盘子里有三种蛋糕。
