Incomplete sentences

English

dangerous Dave went to a fantastic shop in London.

Dangerous Dave went to a fantastic shop in london.

Dangerous Dave went to a fantastic shop in London.

Dangerous Dave went to a Fantastic shop in London.

There are three people on the bus yesterday.

There is three people on the bus yesterday.

There was three people on the bus yesterday.

There were three people on the bus yesterday.

What must a complete sentence have in it?

Which of these words must have a capital letter?

What is the verb in this sentence? Her mum brought a cake.

What is the subject of this sentence? The shop opened at 8am.

Which of these verbs is in the past tense?