I can theorise you can theorise he can theorise we can theorise you can theorise they can theorise
Forma con V-ing
I can be theorising you can be theorising he can be theorising we can be theorising you can be theorising they can be theorising
Perfecto
I can have theorised you can have theorised he can have theorised we can have theorised you can have theorised they can have theorised
Perfecto con V-ing
I can have been theorising you can have been theorising he can have been theorising we can have been theorising you can have been theorising they can have been theorising
Negación
Forma simple
I can't theorise you can't theorise he can't theorise we can't theorise you can't theorise they can't theorise
Forma con V-ing
I can't be theorising you can't be theorising he can't be theorising we can't be theorising you can't be theorising they can't be theorising
Perfecto
I can't have theorised you can't have theorised he can't have theorised we can't have theorised you can't have theorised they can't have theorised
Perfecto con V-ing
I can't have been theorising you can't have been theorising he can't have been theorising we can't have been theorising you can't have been theorising they can't have been theorising
Forma interrogativa
Forma simple
can I theorise? can you theorise? can he theorise? can we theorise? can you theorise? can they theorise?
Forma con V-ing
can I be theorising? can you be theorising? can he be theorising? can we be theorising? can you be theorising? can they be theorising?
Perfecto
can I have theorised? can you have theorised? can he have theorised? can we have theorised? can you have theorised? can they have theorised?
Perfecto con V-ing
can I have been theorising? can you have been theorising? can he have been theorising? can we have been theorising? can you have been theorising? can they have been theorising?
Forma interro-negativa
Forma simple
can't I theorise? can't you theorise? can't he theorise? can't we theorise? can't you theorise? can't they theorise?
Forma con V-ing
can't I be theorising? can't you be theorising? can't he be theorising? can't we be theorising? can't you be theorising? can't they be theorising?
Perfecto
can't I have theorised? can't you have theorised? can't he have theorised? can't we have theorised? can't you have theorised? can't they have theorised?
Perfecto con V-ing
can't I have been theorising? can't you have been theorising? can't he have been theorising? can't we have been theorising? can't you have been theorising? can't they have been theorising?