In French, final consonants, especially s, are not pronounced. This is because plural is understood by mes, tes, ses, les, des, ces, etc.

The most common mistake in English is NOT pronouncing the final s. This creates confusion between singular and plural, as well as the possessive 's. Just as you would finish your golf swing if you don't want your shot to be weak, you MUST FINISH your words.

Before countable nouns, these expressions take the plural:

Try using these expressions with the nouns employees, jobs  or offices.

A  can be used to indicate “a certain ...” or “a different ...” in the singular. For one other, we say another.

These nouns always end with an s : sales, clothes, sports, economics, ethics, logistics, mathematics, physics, politics, statistics

These expressions refer to at least two things, an old and a new:
change _____s, switch _____s, trade _____s

Do NOT Say: change the job, change the shirt, change the car. (changer de)

These expressions refer to negatives (which are not one):
any* _____s, no _____s, without _____s

Notice that the word of in these expressions indicates plural.
a couple of ______s, a number of _____s, lots of _____s, a family of ______s, a team of _____s, one of (possessive) _____s, a lot of _____s

Remember that plurals do not always end with s. Some are irregular.

* in the negative only. It can also mean n'importe quel.