There are two different plurals, which have different uses: staffs and staves.
Staff is:
1. a group of people employed by a company, individual etc, for executive, clerical work, etc
2. a body of teachers or lecturers
3. the officers appointed to assist a commander
The plural is staffs when referring to more than one of the above groups. Example: The General Staffs of all NATO countries attended the meeting.
4. a type of stick, such as a walking stick or emblem of authority
5. something that sustains or supports "bread is the staff of life"
6. a pole on which a flag is hung
7. a pole used as a handle
8. (also called stave) the system of horizontal lines grouped into sets of five, upon which music is written.
The plural is usually staves but sometimes staffs.
The staff were not aware that he was deaf.He was a deaf as a sorcerer's staff.
In this sentence, it would be clearer to say, "all staff use whole group instruction."
The CEO wanted to ensure that all his staff were adequately paid for the work they did for the company
He stood apologetically in front of the staff.
just be happy
You can use the word shortage in the following sentence. There was a shortage of staff members at work this whole week.
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"How do you use Mesozoic era in a sentence." Is a sentence using the words.
The hiker held her staff with both hands as she climbed the jagged cliffs. A staff is a long rod, usually made of wood, used to support oneself while walking or hiking. In other use, it is used by magicians (i.e. wizards) to cast spells.
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We use are when the sentence is in plural and is when the sentence is in singular form.