Conjugación del verbo inglés
CAN TESTIFY

Verbo regular: testify - testified - testified

Afirmación

Forma simple	Forma con V-ing
I can testify you can testify he can testify we can testify you can testify they can testify	I can be testifying you can be testifying he can be testifying we can be testifying you can be testifying they can be testifying
Perfecto	Perfecto con V-ing
I can have testified you can have testified he can have testified we can have testified you can have testified they can have testified	I can have been testifying you can have been testifying he can have been testifying we can have been testifying you can have been testifying they can have been testifying

Negación

Forma simple	Forma con V-ing
I can't testify you can't testify he can't testify we can't testify you can't testify they can't testify	I can't be testifying you can't be testifying he can't be testifying we can't be testifying you can't be testifying they can't be testifying
Perfecto	Perfecto con V-ing
I can't have testified you can't have testified he can't have testified we can't have testified you can't have testified they can't have testified	I can't have been testifying you can't have been testifying he can't have been testifying we can't have been testifying you can't have been testifying they can't have been testifying

Forma interrogativa

Forma simple	Forma con V-ing
can I testify? can you testify? can he testify? can we testify? can you testify? can they testify?	can I be testifying? can you be testifying? can he be testifying? can we be testifying? can you be testifying? can they be testifying?
Perfecto	Perfecto con V-ing
can I have testified? can you have testified? can he have testified? can we have testified? can you have testified? can they have testified?	can I have been testifying? can you have been testifying? can he have been testifying? can we have been testifying? can you have been testifying? can they have been testifying?

Forma interro-negativa

Forma simple	Forma con V-ing
can't I testify? can't you testify? can't he testify? can't we testify? can't you testify? can't they testify?	can't I be testifying? can't you be testifying? can't he be testifying? can't we be testifying? can't you be testifying? can't they be testifying?
Perfecto	Perfecto con V-ing
can't I have testified? can't you have testified? can't he have testified? can't we have testified? can't you have testified? can't they have testified?	can't I have been testifying? can't you have been testifying? can't he have been testifying? can't we have been testifying? can't you have been testifying? can't they have been testifying?