Those who want to go please write their names on the blackboard.

He is one of my friends who are working hard.

He is the (only) one of my friends who is working hard.

④在强调句型中应与被强调部分一致。

It is I who am going to the cinema tonight.

It is we who are going to the cinema tonight.

⑤如果集体名词指的是整个集体，它的谓语动词用单数形式; 如果它指的集体的成员，其谓语动词用复数形式。

The police are looking for the lost child.

The cattle are eating grass in the field.

His family has moved to the south .(他的一家)

His family are watching TV.(他的家人)

Class four is on the third floor.(四班)

Class Four are unable to agree upon a monitor.(四班的学生)

⑥由a lot of /lots of/ plenty of/ a heap of/ heaps of/ the rest of/the majority of+名词构成的短语以及由分数或百分数+名词构成的短语作主语时，其谓语动词的数要根据短语中后面名词的数而定。

There are a lot of people in the classroom.

Three-fourths of the surface of the earth is sea.

50 percent of the students in our class are girls.

此外，还有a number of +复数名词有类似的用法(用复数)，但the number of +复数名词的数就得依number 而定(用单数)。

A number of students have gone to the farm to help the farmer pick apples.

The number of pages in this book is three hundred. ⑦在倒装句中，谓语动词的数应与其后的主语一致