English verb conjugation COULD RAIN

Regular verb: rain - rained - rained

Affirmation

Simple form

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it could rain
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V-ing form

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it could be raining
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Perfect

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it could have rained
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V-ing perfect

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it could have been raining
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Simple form

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it couldn't rain
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V-ing form

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it couldn't be raining
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Perfect

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it couldn't have rained
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V-ing perfect

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it couldn't have been raining
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Simple form

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could it rain?
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V-ing form

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could it be raining?
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Perfect

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could it have rained?
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V-ing perfect

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could it have been raining?
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Simple form

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couldn't it rain?
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V-ing form

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couldn't it be raining?
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Perfect

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couldn't it have rained?
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V-ing perfect

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couldn't it have been raining?
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