Conditional Verb

Question 1

If Simple Present

Answer 1

Then Simple Present (fact/habit) or Simple Future (certainty/possibility)

Question 2

If Simple Past

Answer 2

Then Simple Past (fact/habit) or Would-verb (unlikely habit)

Question 3

If Past Perfect

Answer 3

Then Would have verb (event not occurred)

Question 4

Use of would

Answer 4

Uncertainty, expectation about future, hypothetical condition, assumption