must achieve
Regular verb: achieve - achieved- achieved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must achieve
you must achieve
she must achieve
we must achieve
you must achieve
they must achieve 	I must be achieving
you must be achieving
she must be achieving
we must be achieving
you must be achieving
they must be achieving	I must have achieved
you must have achieved
she must have achieved
we must have achieved
you must have achieved
they must have achieved	I must have been achieving
you must have been achieving
she must have been achieving
we must have been achieving
you must have been achieving
they must have been achieving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't achieve
you mustn't achieve
she mustn't achieve
we mustn't achieve
you mustn't achieve
they mustn't achieve 	I mustn't be achieving
you mustn't be achieving
she mustn't be achieving
we mustn't be achieving
you mustn't be achieving
they mustn't be achieving	I mustn't have achieved
you mustn't have achieved
she mustn't have achieved
we mustn't have achieved
you mustn't have achieved
they mustn't have achieved	I mustn't have been achieving
you mustn't have been achieving
she mustn't have been achieving
we mustn't have been achieving
you mustn't have been achieving
they mustn't have been achieving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I achieve?
must you achieve?
must she achieve?
must we achieve?
must you achieve?
must they achieve? 	must I be achieving?
must you be achieving?
must she be achieving?
must we be achieving?
must you be achieving?
must they be achieving? 	must I have achieved?
must you have achieved?
must she have achieved?
must we have achieved?
must you have achieved?
must they have achieved? 	must I have been achieving?
must you have been achieving?
must she have been achieving?
must we have been achieving?
must you have been achieving?
must they have been achieving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I achieve?
mustn't you achieve?
mustn't she achieve?
mustn't we achieve?
mustn't you achieve?
mustn't they achieve? 	mustn't I be achieving?
mustn't you be achieving?
mustn't she be achieving?
mustn't we be achieving?
mustn't you be achieving?
mustn't they be achieving? 	mustn't I have achieved?
mustn't you have achieved?
mustn't she have achieved?
mustn't we have achieved?
mustn't you have achieved?
mustn't they have achieved? 	mustn't I have been achieving?
mustn't you have been achieving?
mustn't she have been achieving?
mustn't we have been achieving?
mustn't you have been achieving?
mustn't they have been achieving?