Things with two parts

A few plural nouns refer to things that have two parts.
They have no singular form. These are always things we wear:

---

Those trousers are too long.

These binoculars were very expensive.

---

To make it clear we are talking about one of these items, we use a pair of …:

I need a new pair of spectacles.
I've bought a pair of blue jeans.

---

If we want to talk about more than one, we use pairs of …:

We've got three pairs of scissors, but they are all blunt.
I always carry two pairs of binoculars.

---

More Lessons ☛ Here