Learn English – When should we expect an answer

To expect often implies a sense of logical thought. You expect 2 to come after 1, or A to come before B. These notions are what experience or reasonable supposition leads you to believe.

To foresee can also imply the same knowledge based on what you are aware of, but it also carries an element of the mystical, and so can be held apart from logical or reasonable cause-effect situations.

I think it is a bit too thin a difference to really draw a line on, but the nuance is there nonetheless.

'Went' is the simple past conjugation of the verb, 'go'. Saying

"I went to class, but..."

is correct because the you are simply explaining something that has already happened. However, in the case of

I should have gone to class, but...

you need to use the past participle. (The word 'have' is always a clue that you need to use the past participle.)

The reason this is confusing is because for most verbs the past participle corresponds to the simple past tense. (Ex. colored, advanced, helped, stopped) 'Go' is irregular, though, so you have to watch out.

See Past Participles on Udemy for a full explanation.