I must recycle you must recycle she must recycle we must recycle you must recycle they must recycle
V-ing form
I must be recycling you must be recycling she must be recycling we must be recycling you must be recycling they must be recycling
Perfect
I must have recycled you must have recycled she must have recycled we must have recycled you must have recycled they must have recycled
V-ing perfect
I must have been recycling you must have been recycling she must have been recycling we must have been recycling you must have been recycling they must have been recycling
Negation
Simple form
I mustn't recycle you mustn't recycle she mustn't recycle we mustn't recycle you mustn't recycle they mustn't recycle
V-ing form
I mustn't be recycling you mustn't be recycling she mustn't be recycling we mustn't be recycling you mustn't be recycling they mustn't be recycling
Perfect
I mustn't have recycled you mustn't have recycled she mustn't have recycled we mustn't have recycled you mustn't have recycled they mustn't have recycled
V-ing perfect
I mustn't have been recycling you mustn't have been recycling she mustn't have been recycling we mustn't have been recycling you mustn't have been recycling they mustn't have been recycling
Interrogative form
Simple form
must I recycle? must you recycle? must she recycle? must we recycle? must you recycle? must they recycle?
V-ing form
must I be recycling? must you be recycling? must she be recycling? must we be recycling? must you be recycling? must they be recycling?
Perfect
must I have recycled? must you have recycled? must she have recycled? must we have recycled? must you have recycled? must they have recycled?
V-ing perfect
must I have been recycling? must you have been recycling? must she have been recycling? must we have been recycling? must you have been recycling? must they have been recycling?
Interro-negative form
Simple form
mustn't I recycle? mustn't you recycle? mustn't she recycle? mustn't we recycle? mustn't you recycle? mustn't they recycle?
V-ing form
mustn't I be recycling? mustn't you be recycling? mustn't she be recycling? mustn't we be recycling? mustn't you be recycling? mustn't they be recycling?
Perfect
mustn't I have recycled? mustn't you have recycled? mustn't she have recycled? mustn't we have recycled? mustn't you have recycled? mustn't they have recycled?
V-ing perfect
mustn't I have been recycling? mustn't you have been recycling? mustn't she have been recycling? mustn't we have been recycling? mustn't you have been recycling? mustn't they have been recycling?