Regular verb: hiss - hissed - hissed
Simple form | V-ing form |
I must hiss you must hiss he must hiss we must hiss you must hiss they must hiss | I must be hissing you must be hissing he must be hissing we must be hissing you must be hissing they must be hissing |
Perfect | V-ing perfect |
I must have hissed you must have hissed he must have hissed we must have hissed you must have hissed they must have hissed | I must have been hissing you must have been hissing he must have been hissing we must have been hissing you must have been hissing they must have been hissing |
Simple form | V-ing form |
I mustn't hiss you mustn't hiss he mustn't hiss we mustn't hiss you mustn't hiss they mustn't hiss | I mustn't be hissing you mustn't be hissing he mustn't be hissing we mustn't be hissing you mustn't be hissing they mustn't be hissing |
Perfect | V-ing perfect |
I mustn't have hissed you mustn't have hissed he mustn't have hissed we mustn't have hissed you mustn't have hissed they mustn't have hissed | I mustn't have been hissing you mustn't have been hissing he mustn't have been hissing we mustn't have been hissing you mustn't have been hissing they mustn't have been hissing |
Simple form | V-ing form |
must I hiss? must you hiss? must he hiss? must we hiss? must you hiss? must they hiss? | must I be hissing? must you be hissing? must he be hissing? must we be hissing? must you be hissing? must they be hissing? |
Perfect | V-ing perfect |
must I have hissed? must you have hissed? must he have hissed? must we have hissed? must you have hissed? must they have hissed? | must I have been hissing? must you have been hissing? must he have been hissing? must we have been hissing? must you have been hissing? must they have been hissing? |
Simple form | V-ing form |
mustn't I hiss? mustn't you hiss? mustn't he hiss? mustn't we hiss? mustn't you hiss? mustn't they hiss? | mustn't I be hissing? mustn't you be hissing? mustn't he be hissing? mustn't we be hissing? mustn't you be hissing? mustn't they be hissing? |
Perfect | V-ing perfect |
mustn't I have hissed? mustn't you have hissed? mustn't he have hissed? mustn't we have hissed? mustn't you have hissed? mustn't they have hissed? | mustn't I have been hissing? mustn't you have been hissing? mustn't he have been hissing? mustn't we have been hissing? mustn't you have been hissing? mustn't they have been hissing? |