English verb conjugation TO HAPPEN

Regular verb: happen - happened - happened

Indicative

Present

-
-
it doesn't happen
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-
-

Present continuous

-
-
it isn't happening
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-
-

Preterite

-
-
it didn't happen
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-
-

Preterite continuous

-
-
it wasn't happening
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-
-

Present perfect

-
-
it hasn't happened
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-
-

Present perfect continuous

-
-
it hasn't been happening
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-
-

Pluperfect

-
-
it hadn't happened
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-
-

Pluperfect continuous

-
-
it hadn't been happening
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-
-

Future

-
-
it won't happen
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-
-

Future continuous

-
-
it won't be happening
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-
-

Future perfect

-
-
it won't have happened
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-
-

Future perfect continuous

-
-
it won't have been happening
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-
-

Present

-
-
it wouldn't happen
-
-
-

Present continuous

-
-
it wouldn't be happening
-
-
-

Past

-
-
it wouldn't have happened
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-
-

Past continuous

-
-
it wouldn't have been happening
-
-
-

-
Let's not happen
-

to happen

Present

happening

Past

happened