could lapse
Verbe régulier : lapse - lapsed- lapsed
Traduction française : baisser - tomber 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could lapse
you could lapse
she could lapse
we could lapse
you could lapse
they could lapse 	I could be lapsing
you could be lapsing
she could be lapsing
we could be lapsing
you could be lapsing
they could be lapsing	I could have lapsed
you could have lapsed
she could have lapsed
we could have lapsed
you could have lapsed
they could have lapsed	I could have been lapsing
you could have been lapsing
she could have been lapsing
we could have been lapsing
you could have been lapsing
they could have been lapsing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't lapse
you couldn't lapse
she couldn't lapse
we couldn't lapse
you couldn't lapse
they couldn't lapse 	I couldn't be lapsing
you couldn't be lapsing
she couldn't be lapsing
we couldn't be lapsing
you couldn't be lapsing
they couldn't be lapsing	I couldn't have lapsed
you couldn't have lapsed
she couldn't have lapsed
we couldn't have lapsed
you couldn't have lapsed
they couldn't have lapsed	I couldn't have been lapsing
you couldn't have been lapsing
she couldn't have been lapsing
we couldn't have been lapsing
you couldn't have been lapsing
they couldn't have been lapsing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I lapse?
could you lapse?
could she lapse?
could we lapse?
could you lapse?
could they lapse? 	could I be lapsing?
could you be lapsing?
could she be lapsing?
could we be lapsing?
could you be lapsing?
could they be lapsing? 	could I have lapsed?
could you have lapsed?
could she have lapsed?
could we have lapsed?
could you have lapsed?
could they have lapsed? 	could I have been lapsing?
could you have been lapsing?
could she have been lapsing?
could we have been lapsing?
could you have been lapsing?
could they have been lapsing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I lapse?
couldn't you lapse?
couldn't she lapse?
couldn't we lapse?
couldn't you lapse?
couldn't they lapse? 	couldn't I be lapsing?
couldn't you be lapsing?
couldn't she be lapsing?
couldn't we be lapsing?
couldn't you be lapsing?
couldn't they be lapsing? 	couldn't I have lapsed?
couldn't you have lapsed?
couldn't she have lapsed?
couldn't we have lapsed?
couldn't you have lapsed?
couldn't they have lapsed? 	couldn't I have been lapsing?
couldn't you have been lapsing?
couldn't she have been lapsing?
couldn't we have been lapsing?
couldn't you have been lapsing?
couldn't they have been lapsing?