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