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
she can tread
we can tread
you can tread
they can tread 	I can be treading
you can be treading
she 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
she 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
she 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
she 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
she 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
she 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
she 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 she tread?
can we tread?
can you tread?
can they tread? 	can I be treading?
can you be treading?
can she 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 she 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 she 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 she 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 she 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 she 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 she have been treading?
can't we have been treading?
can't you have been treading?
can't they have been treading?