can thunder
Regular verb: thunder - thundered- thundered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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it can thunder
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it can be thundering
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it can have thundered
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it can have been thundering
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Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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it cannot thunder
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it cannot be thundering
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it cannot have thundered
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it cannot have been thundering
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Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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can it thunder?
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can it be thundering?
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can it have thundered?
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can it have been thundering?
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Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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can it not thunder?
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can it not be thundering?
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can it not have thundered?
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can it not have been thundering?
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