ought to mask
Regular verb: mask - masked- masked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to mask
you ought to mask
he ought to mask
we ought to mask
you ought to mask
they ought to mask 	I ought to be masking
you ought to be masking
he ought to be masking
we ought to be masking
you ought to be masking
they ought to be masking	I ought to have masked
you ought to have masked
he ought to have masked
we ought to have masked
you ought to have masked
they ought to have masked	I ought to have been masking
you ought to have been masking
he ought to have been masking
we ought to have been masking
you ought to have been masking
they ought to have been masking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to mask
you ought not to mask
he ought not to mask
we ought not to mask
you ought not to mask
they ought not to mask 	I ought not to masking
you ought not to masking
he ought not to masking
we ought not to masking
you ought not to masking
they ought not to masking	I ought not to have masked
you ought not to have masked
he ought not to have masked
we ought not to have masked
you ought not to have masked
they ought not to have masked	I ought not to have been masking
you ought not to have been masking
he ought not to have been masking
we ought not to have been masking
you ought not to have been masking
they ought not to have been masking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I mask?
ought to you mask?
ought to he mask?
ought to we mask?
ought to you mask?
ought to they mask? 	ought to I be masking?
ought to you be masking?
ought to he be masking?
ought to we be masking?
ought to you be masking?
ought to they be masking? 	ought to I have masked?
ought to you have masked?
ought to he have masked?
ought to we have masked?
ought to you have masked?
ought to they have masked? 	ought to I have been masking?
ought to you have been masking?
ought to he have been masking?
ought to we have been masking?
ought to you have been masking?
ought to they have been masking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to mask?
ought you not to mask?
ought he not to mask?
ought we not to mask?
ought you not to mask?
ought they not to mask? 	ought I not to be masking?
ought you not to be masking?
ought he not to be masking?
ought we not to be masking?
ought you not to be masking?
ought they not to be masking? 	ought I not to have masked?
ought you not to have masked?
ought he not to have masked?
ought we not to have masked?
ought you not to have masked?
ought they not to have masked? 	ought I not to have been masking?
ought you not to have been masking?
ought he not to have been masking?
ought we not to have been masking?
ought you not to have been masking?
ought they not to have been masking?