1. This is a group of students who help the sick.

Question

2. These are a group of students who help the sick.

3. This is a group of students who helps the sick.

4. These are a group of students who helps the sick.

(Which expressions are correct? Please focus on 'this' and 'help. Is 'group' a collective noun? Thank you.)

Answer 1

#3. This is singular as is group, a collective noun. The group it does help, is helping, helps.

These is plural so it would have to be "These groups"

Sra

Answer 2

1. This is a group of students who help the sick. OK

2. These are groups of students who help the sick.

3. This is a group of students who helps the sick. OK

4. These are groups of students who help the sick.