I would never betray somebody who really loves me
Its Past Simple Tense is "Might"
They are Modals for abilities and possibilities
Interrogative: Modal verb + Subject + Inf. V. + complement ?
May I go to the bathroom, please?
but
Subject + Modal (Would/wouldn't) + Inf. V. + complement
This Modal sometimes is used to request something
She could see from my eyes where I was flying high
I can play different sports in the school
Would you like some tea?
They are connectors
Could: Past Simple Tense
It's the Past Simple of "Will"
It's another type of Modal Verb
They are used to contrast, compare, fusion, expected things and unexpected things
These type of Modals may come out in Conditionals and Compound Tenses
Can: Present Simple Tense
although
May, Can, Could, Would
They are used to express: permisions, abilities, possibilities and probabilities
Negative Structure is: Subject + Modal verb (with not) + Inf. V. + complement
or
For probabilities (certain facts which will happen)
It's specially when somebody request permissions
A Modal for Conditionals (for Second Conditional)
Oscorp may lose contract to Quest
It's a formal Modal Verb
Structure is: Subject + Modal Verb + Inf. V. + complement
and