English Grammar

Invariable grammar categories with examples in detail

Invariable grammatical categories

In this lesson we are going to focus on knowing what invariables are. The invariable grammatical categories are those that do not present any variation of gender and number. That is, they do not admit in their formation any type of inflectional morpheme and will remain unchanged regardless of the gender and number of the subject of the sentence. In other words, they do not have to agree with the subject. Within this group we find the following grammatical categories: Invariable grammar categories with examples

  • Adverbs
  • Prepositions
  • Conjunctions
  • Interjections

Next we will define each one of them and show examples of them so that you can easily identify them.

1-The adverbs

Adverbs show different circumstances within a sentence. In other words, adverbs are invariable words that will always function as a circumstantial complement and that indicate circumstances related to the verb they accompany, such as time, mode, place … etc. In the following sentences we can see some examples of adverbs.

  • This is not how you will get there.
  • Carmen sat in front .
  • His house is far from the center.
  • Irene completed her homework easily .
  • The suspicious man was behind them when they got off the bus.
  • They were quite late for the doctor’s appointment.

2-The prepositions

 These will always function as a prepositional phrase and will remain unchanged in the sentence. Here is the list of prepositions and some examples of these in sentences: Invariable grammar categories with examples

  • TO
  • In view of
  • Under
  • It fits
  • With
  • Against
  • From
  • Since
  • On
  • Between
  • Toward
  • Until
  • Through
  • In order to
  • For
  • According
  • Without
  • SW
  • On
  • After

Let’s look at some examples:

  • The safe was behind the painting.
  • I went home from Pedro on Monday.
  • You must continue to the right to reach the bakery.
  • The jug of water is in the refrigerator.
  • We were with them all afternoon.
  • Between the park and the station there are no more than 50 meters.


The conjunctions are invariable grammatical category. These types of words are the ones that are used when we want to unite different premises with each other. Conjunctions work as a nexus, allowing you to join different words, groups of words, or sentences. Within conjunctions we can find different types of which we will see an example below:

  • Adversative : but, more, but … For example. He was tired but he came driving his car.
  • Causes : because, for, like, well … An example. He failed the exam because he had not studied enough for it.
  • Comparison : so, so much, that, like … For example. The child likes both vegetables and fish.
  • Concessive : although… for example. Even though I really wanted to go on vacation, I can’t.
  • Conditionals : yes … an example is the following sentence. I could have passed the driving test if I had done more practice over the summer.
  • Consecutive : so, therefore, what, then … Let’s look at an example. You have finished your homework, so you can call your friends to go play outside.
  • Copulatives : y, e, ni … we would find an example in the following sentence. Carmen and Ignacio are great friends.
  • Dilemmas : o, u… for example. Either you come with us or you stay home.
  • Finals : for… Let’s see an example. You should have studied a lot more to pass.
  • Temporary : when, before, while … An example can be the following sentence. While you finish work I’m going to make some calls.


Interjections are easy to identify, since they appear between exclamation marks, remain unchanged and are used when we want to seek the listener’s attention or show a state of mind. Here are some phrases with interjections that will help you easily recognize them:

  • Bah ! This is sheer nonsense.
  • Ay ! I’ve hurt.
  •  Eh ? Were you talking to me?
  • FABP ! Gross! Invariable grammar categories with examples
  • Alto , police!
  • Cool ! I didn’t expect it to be that easy.
  • Phew ! I hope it gives me time to finish it before the deadline.
  • Oh ! That fountain is wonderful, I have never seen anything like it

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