Aquesta clàusula és important.

This clause is important.

Breakdown of Aquesta clàusula és important.

• ser: to be
• important: important
• aquest: this
• la clàusula: the clause

Questions & Answers about Aquesta clàusula és important.

Why is it aquesta and not aquest?

Because clàusula is a feminine singular noun, and the demonstrative has to agree with it.

• aquest = this (masculine singular)
• aquesta = this (feminine singular)
• aquests = these (masculine plural)
• aquestes = these (feminine plural)

So:

• aquest llibre = this book
• aquesta clàusula = this clause

Catalan agreement works more visibly than English here.

How do I know that clàusula is feminine?

In this sentence, you can tell because it takes aquesta, the feminine form of this.

Also, nouns ending in -a are often feminine in Catalan, though not always. So clàusula follows a very common pattern.

You would normally say:

• la clàusula
• aquesta clàusula

If it were masculine, you would expect something like el or aquest instead.

Why is there és here?

És is the 3rd person singular of the verb ser = to be.

So:

• és = is