Irregular verb: sit - sat - sat
Simple form | V-ing form |
I must sit you must sit he must sit we must sit you must sit they must sit | I must be sitting you must be sitting he must be sitting we must be sitting you must be sitting they must be sitting |
Perfect | V-ing perfect |
I must have sat you must have sat he must have sat we must have sat you must have sat they must have sat | I must have been sitting you must have been sitting he must have been sitting we must have been sitting you must have been sitting they must have been sitting |
Simple form | V-ing form |
I mustn't sit you mustn't sit he mustn't sit we mustn't sit you mustn't sit they mustn't sit | I mustn't be sitting you mustn't be sitting he mustn't be sitting we mustn't be sitting you mustn't be sitting they mustn't be sitting |
Perfect | V-ing perfect |
I mustn't have sat you mustn't have sat he mustn't have sat we mustn't have sat you mustn't have sat they mustn't have sat | I mustn't have been sitting you mustn't have been sitting he mustn't have been sitting we mustn't have been sitting you mustn't have been sitting they mustn't have been sitting |
Simple form | V-ing form |
must I sit? must you sit? must he sit? must we sit? must you sit? must they sit? | must I be sitting? must you be sitting? must he be sitting? must we be sitting? must you be sitting? must they be sitting? |
Perfect | V-ing perfect |
must I have sat? must you have sat? must he have sat? must we have sat? must you have sat? must they have sat? | must I have been sitting? must you have been sitting? must he have been sitting? must we have been sitting? must you have been sitting? must they have been sitting? |
Simple form | V-ing form |
mustn't I sit? mustn't you sit? mustn't he sit? mustn't we sit? mustn't you sit? mustn't they sit? | mustn't I be sitting? mustn't you be sitting? mustn't he be sitting? mustn't we be sitting? mustn't you be sitting? mustn't they be sitting? |
Perfect | V-ing perfect |
mustn't I have sat? mustn't you have sat? mustn't he have sat? mustn't we have sat? mustn't you have sat? mustn't they have sat? | mustn't I have been sitting? mustn't you have been sitting? mustn't he have been sitting? mustn't we have been sitting? mustn't you have been sitting? mustn't they have been sitting? |