English verb conjugation
CAN THEORISE

Regular verb: theorise - theorised - theorised

Affirmation

Simple form	V-ing form
I can theorise you can theorise he can theorise we can theorise you can theorise they can theorise	I can be theorising you can be theorising he can be theorising we can be theorising you can be theorising they can be theorising
Perfect	V-ing perfect
I can have theorised you can have theorised he can have theorised we can have theorised you can have theorised they can have theorised	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

Negation

Simple form	V-ing form
I can't theorise you can't theorise he can't theorise we can't theorise you can't theorise they can't theorise	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
Perfect	V-ing perfect
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	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

Interrogative form

Simple form	V-ing form
can I theorise? can you theorise? can he theorise? can we theorise? can you theorise? can they theorise?	can I be theorising? can you be theorising? can he be theorising? can we be theorising? can you be theorising? can they be theorising?
Perfect	V-ing perfect
can I have theorised? can you have theorised? can he have theorised? can we have theorised? can you have theorised? can they have theorised?	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?

Interro-negative form

Simple form	V-ing form
can't I theorise? can't you theorise? can't he theorise? can't we theorise? can't you theorise? can't they theorise?	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?
Perfect	V-ing perfect
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?	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?