I must shimmer you must shimmer he must shimmer we must shimmer you must shimmer they must shimmer
V-ing form
I must be shimmering you must be shimmering he must be shimmering we must be shimmering you must be shimmering they must be shimmering
Perfect
I must have shimmered you must have shimmered he must have shimmered we must have shimmered you must have shimmered they must have shimmered
V-ing perfect
I must have been shimmering you must have been shimmering he must have been shimmering we must have been shimmering you must have been shimmering they must have been shimmering
Negation
Simple form
I mustn't shimmer you mustn't shimmer he mustn't shimmer we mustn't shimmer you mustn't shimmer they mustn't shimmer
V-ing form
I mustn't be shimmering you mustn't be shimmering he mustn't be shimmering we mustn't be shimmering you mustn't be shimmering they mustn't be shimmering
Perfect
I mustn't have shimmered you mustn't have shimmered he mustn't have shimmered we mustn't have shimmered you mustn't have shimmered they mustn't have shimmered
V-ing perfect
I mustn't have been shimmering you mustn't have been shimmering he mustn't have been shimmering we mustn't have been shimmering you mustn't have been shimmering they mustn't have been shimmering
Interrogative form
Simple form
must I shimmer? must you shimmer? must he shimmer? must we shimmer? must you shimmer? must they shimmer?
V-ing form
must I be shimmering? must you be shimmering? must he be shimmering? must we be shimmering? must you be shimmering? must they be shimmering?
Perfect
must I have shimmered? must you have shimmered? must he have shimmered? must we have shimmered? must you have shimmered? must they have shimmered?
V-ing perfect
must I have been shimmering? must you have been shimmering? must he have been shimmering? must we have been shimmering? must you have been shimmering? must they have been shimmering?
Interro-negative form
Simple form
mustn't I shimmer? mustn't you shimmer? mustn't he shimmer? mustn't we shimmer? mustn't you shimmer? mustn't they shimmer?
V-ing form
mustn't I be shimmering? mustn't you be shimmering? mustn't he be shimmering? mustn't we be shimmering? mustn't you be shimmering? mustn't they be shimmering?
Perfect
mustn't I have shimmered? mustn't you have shimmered? mustn't he have shimmered? mustn't we have shimmered? mustn't you have shimmered? mustn't they have shimmered?
V-ing perfect
mustn't I have been shimmering? mustn't you have been shimmering? mustn't he have been shimmering? mustn't we have been shimmering? mustn't you have been shimmering? mustn't they have been shimmering?