Coursework Research - Dialogue

What is dialogue?
Dialogue is a conversation between two or more people as a feature of a play, book or film.

Is dialogue necessary in the opening two minutes of a feature film?
I don't think that dialogue is completely necessary in the opening two minutes of a feature film, a lot of film trailers and the opening of films feature no sound at all, meaning obviously that there would be no dialogue at all. If you include dialogue you normally tend to give away more of the plot compared to if you weren't going to use it, this therefore keeps the plot of the film unknown and then makes the audience more intrigued and curious about the rest of the film. Dialogue which is used in the opening of films has to be used wisely and effectively as it sets the tone for the rest of the film, so it's best to only include dialogue in the opening of a film if it can be used in the way you wish it to be used.

Find one example for each of the following genres where dialogue is NOT used and one example for each where it IS used in the opening two minutes.

Comedy -

Where dialogue is used: Borat - https://www.youtube.com/watch?v=3BfeANSBff8
Where dialogue is not used: Hot Fuzz - https://www.youtube.com/watch?v=3RAkY4R691E
  Horror -

Where dialogue is used: The Conjuring - https://www.youtube.com/watch?v=ZKDDyaViwj8&t=21s
Where dialogue is not used: The Babadook - https://www.youtube.com/watch?v=ZLrmAWdXkns

Action -

Where dialogue is used: The Dark Knight - https://www.youtube.com/watch?v=lxV7r0-RAKc
Where dialogue is not used: Casino Royale - https://www.youtube.com/watch?v=A1AMUmkj-ck

Drama -

Where dialogue is used: Boyhood - https://www.youtube.com/watch?v=-P9fmUMBcZg
Where dialogue is not used: Schindler's List - https://www.youtube.com/watch?v=24fwJMLsyNs

Romance -

Where dialogue is used: Silver Linings the Playbook - https://www.youtube.com/watch?v=ZabC1qRtAmE
Where dialogue is not used: Dear John -  https://www.youtube.com/watch?v=xxqAp52dkUs