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