can tread
Verbo irregular: tread - trod- trod, trodden

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can tread
you can tread
he can tread
we can tread
you can tread
they can tread 	I can be treading
you can be treading
he can be treading
we can be treading
you can be treading
they can be treading	I can have trod, trodden
you can have trod, trodden
he can have trod, trodden
we can have trod, trodden
you can have trod, trodden
they can have trod, trodden	I can have been treading
you can have been treading
he can have been treading
we can have been treading
you can have been treading
they can have been treading	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't tread
you can't tread
he can't tread
we can't tread
you can't tread
they can't tread 	I can't be treading
you can't be treading
he can't be treading
we can't be treading
you can't be treading
they can't be treading	I can't have trod, trodden
you can't have trod, trodden
he can't have trod, trodden
we can't have trod, trodden
you can't have trod, trodden
they can't have trod, trodden	I can't have been treading
you can't have been treading
he can't have been treading
we can't have been treading
you can't have been treading
they can't have been treading	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I tread?
can you tread?
can he tread?
can we tread?
can you tread?
can they tread? 	can I be treading?
can you be treading?
can he be treading?
can we be treading?
can you be treading?
can they be treading? 	can I have trod, trodden?
can you have trod, trodden?
can he have trod, trodden?
can we have trod, trodden?
can you have trod, trodden?
can they have trod, trodden? 	can I have been treading?
can you have been treading?
can he have been treading?
can we have been treading?
can you have been treading?
can they have been treading? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I tread?
can't you tread?
can't he tread?
can't we tread?
can't you tread?
can't they tread? 	can't I be treading?
can't you be treading?
can't he be treading?
can't we be treading?
can't you be treading?
can't they be treading? 	can't I have trod, trodden?
can't you have trod, trodden?
can't he have trod, trodden?
can't we have trod, trodden?
can't you have trod, trodden?
can't they have trod, trodden? 	can't I have been treading?
can't you have been treading?
can't he have been treading?
can't we have been treading?
can't you have been treading?
can't they have been treading?