should snow
Verbo regular: snow - snowed- snowed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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it should snow
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-
- 	-
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it should be snowing
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-
- 	-
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it should have snowed
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-
- 	-
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it should have been snowing
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-
- 	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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it should not snow
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-
- 	-
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it should not be snowing
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-
- 	-
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it should not have snowed
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-
- 	-
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it should not have been snowing
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- 	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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should it snow?
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-
- 	-
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should it be snowing?
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-
- 	-
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should it have snowed?
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-
- 	-
-
should it have been snowing?
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-
- 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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should it not snow?
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-
- 	-
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should it not be snowing?
-
-
- 	-
-
should it not have snowed?
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-
- 	-
-
should it not have been snowing?
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-
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