Daisy has a date with Jack and Sophie is working in Brazil.

The form of the verb to be is am (contracted to 'm), is ('s) and are ('re) in the present tense and was/were in the past. To be is used as an auxiliary verb, to form continuous tenses and the passive, and as a main verb. Here we are looking at it as a main verb.

After the verb to be we use an adjective phrase, a noun phrase, a preposition phrase or an adverb phrase.

Oh, wow! That sounds complicated.

No, don't worry. I'm going to give you lots of examples. Here are some examples with adjectives or adjective phrases:

I'm a bit tired.
He was late last time too.
The journey was fantastic.
My brother isn't very tall.

Here are examples with nouns or noun phrases:

She was an English teacher for years.
They're both teachers at our school.
That's my laptop.

And here are examples with adverb and preposition phrases:

I'm here at the café, and you're not!
Are you there yet?
Your phone's in my bag.
Where were you at