Irregular verb: sing - sang - sung
Simple form | V-ing form |
I must sing you must sing she must sing we must sing you must sing they must sing | I must be singing you must be singing she must be singing we must be singing you must be singing they must be singing |
Perfect | V-ing perfect |
I must have sung you must have sung she must have sung we must have sung you must have sung they must have sung | I must have been singing you must have been singing she must have been singing we must have been singing you must have been singing they must have been singing |
Simple form | V-ing form |
I mustn't sing you mustn't sing she mustn't sing we mustn't sing you mustn't sing they mustn't sing | I mustn't be singing you mustn't be singing she mustn't be singing we mustn't be singing you mustn't be singing they mustn't be singing |
Perfect | V-ing perfect |
I mustn't have sung you mustn't have sung she mustn't have sung we mustn't have sung you mustn't have sung they mustn't have sung | I mustn't have been singing you mustn't have been singing she mustn't have been singing we mustn't have been singing you mustn't have been singing they mustn't have been singing |
Simple form | V-ing form |
must I sing? must you sing? must she sing? must we sing? must you sing? must they sing? | must I be singing? must you be singing? must she be singing? must we be singing? must you be singing? must they be singing? |
Perfect | V-ing perfect |
must I have sung? must you have sung? must she have sung? must we have sung? must you have sung? must they have sung? | must I have been singing? must you have been singing? must she have been singing? must we have been singing? must you have been singing? must they have been singing? |
Simple form | V-ing form |
mustn't I sing? mustn't you sing? mustn't she sing? mustn't we sing? mustn't you sing? mustn't they sing? | mustn't I be singing? mustn't you be singing? mustn't she be singing? mustn't we be singing? mustn't you be singing? mustn't they be singing? |
Perfect | V-ing perfect |
mustn't I have sung? mustn't you have sung? mustn't she have sung? mustn't we have sung? mustn't you have sung? mustn't they have sung? | mustn't I have been singing? mustn't you have been singing? mustn't she have been singing? mustn't we have been singing? mustn't you have been singing? mustn't they have been singing? |