English verb conjugation
CAN THUNDER

Regular verb: thunder - thundered - thundered

Affirmation

Simple form	V-ing form
- - it can thunder - - -	- - it can be thundering - - -
Perfect	V-ing perfect
- - it can have thundered - - -	- - it can have been thundering - - -

Negation

Simple form	V-ing form
- - it can't thunder - - -	- - it can't be thundering - - -
Perfect	V-ing perfect
- - it can't have thundered - - -	- - it can't have been thundering - - -

Interrogative form

Simple form	V-ing form
- - can it thunder? - - -	- - can it be thundering? - - -
Perfect	V-ing perfect
- - can it have thundered? - - -	- - can it have been thundering? - - -

Interro-negative form

Simple form	V-ing form
- - can't it thunder? - - -	- - can't it be thundering? - - -
Perfect	V-ing perfect
- - can't it have thundered? - - -	- - can't it have been thundering? - - -