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This page provides example sentences of the verb "Know" in all tenses including active and passive forms, as well as conditional and modal forms.
Base Form know / Past Simple knew / Past Participle known / Gerund knowing
He knows a lot of people in Paris.
Present Simple Passive
The President is known to be in trouble.
Present Continuous Passive
They have known each other for years.
Present Perfect Passive
The facts in the case have been known since last year.
Present Perfect Continuous
She knew it was time to leave.
Past Simple Passive
The story was known by all in the room.
Past Continuous Passive
They had known about the problem before they told him.
Past Perfect Passive
The problem had been known about by all before they told him.
Past Perfect Continuous
She will know it's you.
Future (will) passive
You will be known by everybody in the room.
Future (going to)
She is going to know the answer soon.
Future (going to) passive
The answer is going to be known at the end of the lesson.
They will have known Jack for twenty years by the end of this month.
She might know the answer.
If she knows the answer, she will tell you.
If she knew the answer, she would tell you.
Past Unreal Conditional
If she had known the answer, she would have told you.
Andy should know the answer.
Andy should have known the answer.
Quiz: Conjugate with Know
Use the verb "to know" to conjugate the following sentences. Quiz answers are below. In some cases, more than one answer may be correct.
They _____ about the problem before they told him.
The President _____ to be in trouble.
The facts in the case _____ since last year.
They _____ Jack for twenty years by the end of this month.
If she _____ the answer, she will tell you.
The story _____ by all in the room at the trial yesterday.
They _____ each other for years.
He _____ a lot of people in Paris.
If she _____ the answer, she would have told you.
She _____ it's you.
have been known
will have known