English verb conjugation MUST RAIN

Regular verb: rain - rained - rained

Affirmation

Simple form

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it must rain
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V-ing form

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it must be raining
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Perfect

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it must have rained
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V-ing perfect

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it must have been raining
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Simple form

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it mustn't rain
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V-ing form

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it mustn't be raining
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Perfect

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it mustn't have rained
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V-ing perfect

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it mustn't have been raining
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Simple form

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must it rain?
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V-ing form

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must it be raining?
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Perfect

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must it have rained?
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V-ing perfect

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must it have been raining?
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Simple form

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mustn't it rain?
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V-ing form

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mustn't it be raining?
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Perfect

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mustn't it have rained?
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V-ing perfect

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mustn't it have been raining?
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