如题所述
单数复数，是看后面的单词。
至于the rest 的谓语用三人称单数形式还是复数形式，要根据 the rest 所指代的或者所形容的物体是单数还是复数来确定。
如果 the rest 指代的或者形容的物体是复数，那么后面的谓语就应该使用复数形式。
例句：Two thirds of the students will go home during the summer vacation and the rest are going to travel.（三分之二的学生在暑假的时候会回家，剩下的打算去旅游。） 这里的the rest指代的是“剩下的”students，students是个复数名词，所以后面的谓语be going to do 用的是are going to travel.
如果the rest 指代的或者形容的物体是单数或者不可数名词，那么后面的谓语就应该使用三人称单数形式。
例句：Most water was sent to wash the car and the rest was used to drink.（大部分水被送去洗车了，剩下的用来喝。）这里的the rest指代的是“剩下的”water，water是个不可数名词，所以后面的谓语be动词用的三人称单数形式was（is的过去式）。the rest 后接续名词或代词或be动词，表示余下的（其它/他的）意思。后接续名词或代词或be动词的单复数形式取决于the rest 所指代的名词或代词是可数还是不可数。
Some persons are planting trees, and the rest are watering them.(the rest 指的是the other persons，谓语用复数.)I drank only a little of the wine.The rest was drunk by him.(指的是the wine。wine,不可数，谓语用单数.)。
1、如果 the rest 指代的或者形容的物体是复数，那么后面的谓语就应该使用复数形式。
例句：Two thirds of the students will go home during the summer vacation and the rest are going to travel.（三分之二的学生在暑假的时候会回家，剩下的打算去旅游。） 这里的the rest指代的是“剩下的”students，students是个复数名词，所以后面的谓语be going to do 用的是are going to travel.
2、如果the rest 指代的或者形容的物体是单数或者不可数名词，那么后面的谓语就应该使用三人称单数形式。
例句：Most water was sent to wash the car and the rest was used to drink.（大部分水被送去洗车了，剩下的用来喝。）这里的the rest指代的是“剩下的”water，water是个不可数名词，所以后面的谓语be动词用的三人称单数形式was（is的过去式）。
如果是可数名词，谓语动词用复数，此时 the rest =the others =the other +名词复数，如果是不可数名词，谓语动词用单数。
如
1.There are fifty students in our class,twenty are girls , the rest are boys .（students 是复数，故动词be 用 are )
=There are fifty students in our class,twenty are girls , the others are boys .
=There are fifty students in our class,twenty are girls , the other students are boys .
我们班有50学生，20是女生，其余的是男生。
2.There is some meet on the plate,you can eat a little ,the rest is for your father .（meat 是不可数名词，故动词be用is )
盘子里有一些肉，你可以吃一点，其余的留给你父亲。
3.After drinking some milk in the bottle,the rest was thrown away by him .
他喝了瓶子里的一些牛奶后其余的被他扔掉了。
单数：
After drinking some milk in the bottle,he threw the rest away which was a bit sour.（不可数名词）
He ate some part of the apple and the rest of it was given to a rabbit.(一件物品的一部分）
其余情况用复数：
Some students go swimming,and the rest keep studying English.
I have given you ten piture books,and the rest are English novels.
来源于百度作业帮
后接续名词或代词或be动词的单复数形式取决于the rest 所指代的名词或代词是可数还是不可数。
如：Some persons are planting trees, and the rest are watering them.(the rest 指的是the other persons，谓语用复数.)
I drank only a little of the wine.The rest was drunk by him.(指的是the wine。wine,不可数，谓语用单数.)本回答被提问者采纳
