Would have known or knew?
If you have known him the whole time, the only choice is: I have known Tom since he was just five years old. There is a case where “I knew” works in this sentence. If Tom is no longer living it would be appropriate to say “I knew” instead of “I have known.”
Had known or would have known?
Correct: If I had known that you were going to the movies, [then] I would have gone too. The conditional perfect can only go in the “then” clause — it is grammatically incorrect to use the conditional perfect in the “if” clause: Incorrect: If I would have known that you were going to the movies, I would have gone too.
How do you use known?
3) Present perfect “have known” is exactly the right tense to express something continuing from the past up to the present moment. “Had [verb]” (past perfect) is used for past {event/situation} which {completed/is no longer the case}.
Had we known meaning?
This expression is used when we are talking about something we did not know in the past, but we wish had known it at the time. Our action in the past would have been different if we knew that information. This sentence pattern has exactly the same meaning as “If I had known that…”.
Would have had sentences?
“He would’ve had a difficult time with this test if he hadn’t studied so hard.” “I would’ve had a chance to talk to her if I hadn’t left the party early.” “They would have had a house by now if they had saved more money.” “She would’ve had health problems by now if she had continued smoking.”
Would have known meaning?
—used to say that one is not surprised to learn of something I should have known it would be too expensive.
Have to and had to difference?
“Have to’ is used for the present and future tense, while “Had to” is used for the past tense. The action which has been just completed at the moment or is in continuous form uses the verb ‘have to,” whereas the actions that have been completed in the past use the verb “had to”.