must obstruct
Verbe régulier : obstruct - obstructed- obstructed
Traduction française : bloquer - faire obstruction ou obstacle à 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must obstruct
you must obstruct
she must obstruct
we must obstruct
you must obstruct
they must obstruct 	I must be obstructing
you must be obstructing
she must be obstructing
we must be obstructing
you must be obstructing
they must be obstructing	I must have obstructed
you must have obstructed
she must have obstructed
we must have obstructed
you must have obstructed
they must have obstructed	I must have been obstructing
you must have been obstructing
she must have been obstructing
we must have been obstructing
you must have been obstructing
they must have been obstructing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't obstruct
you mustn't obstruct
she mustn't obstruct
we mustn't obstruct
you mustn't obstruct
they mustn't obstruct 	I mustn't be obstructing
you mustn't be obstructing
she mustn't be obstructing
we mustn't be obstructing
you mustn't be obstructing
they mustn't be obstructing	I mustn't have obstructed
you mustn't have obstructed
she mustn't have obstructed
we mustn't have obstructed
you mustn't have obstructed
they mustn't have obstructed	I mustn't have been obstructing
you mustn't have been obstructing
she mustn't have been obstructing
we mustn't have been obstructing
you mustn't have been obstructing
they mustn't have been obstructing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I obstruct?
must you obstruct?
must she obstruct?
must we obstruct?
must you obstruct?
must they obstruct? 	must I be obstructing?
must you be obstructing?
must she be obstructing?
must we be obstructing?
must you be obstructing?
must they be obstructing? 	must I have obstructed?
must you have obstructed?
must she have obstructed?
must we have obstructed?
must you have obstructed?
must they have obstructed? 	must I have been obstructing?
must you have been obstructing?
must she have been obstructing?
must we have been obstructing?
must you have been obstructing?
must they have been obstructing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I obstruct?
mustn't you obstruct?
mustn't she obstruct?
mustn't we obstruct?
mustn't you obstruct?
mustn't they obstruct? 	mustn't I be obstructing?
mustn't you be obstructing?
mustn't she be obstructing?
mustn't we be obstructing?
mustn't you be obstructing?
mustn't they be obstructing? 	mustn't I have obstructed?
mustn't you have obstructed?
mustn't she have obstructed?
mustn't we have obstructed?
mustn't you have obstructed?
mustn't they have obstructed? 	mustn't I have been obstructing?
mustn't you have been obstructing?
mustn't she have been obstructing?
mustn't we have been obstructing?
mustn't you have been obstructing?
mustn't they have been obstructing?