I must wobble you must wobble he must wobble we must wobble you must wobble they must wobble
V-ing form
I must be wobbling you must be wobbling he must be wobbling we must be wobbling you must be wobbling they must be wobbling
Perfect
I must have wobbled you must have wobbled he must have wobbled we must have wobbled you must have wobbled they must have wobbled
V-ing perfect
I must have been wobbling you must have been wobbling he must have been wobbling we must have been wobbling you must have been wobbling they must have been wobbling
Negation
Simple form
I mustn't wobble you mustn't wobble he mustn't wobble we mustn't wobble you mustn't wobble they mustn't wobble
V-ing form
I mustn't be wobbling you mustn't be wobbling he mustn't be wobbling we mustn't be wobbling you mustn't be wobbling they mustn't be wobbling
Perfect
I mustn't have wobbled you mustn't have wobbled he mustn't have wobbled we mustn't have wobbled you mustn't have wobbled they mustn't have wobbled
V-ing perfect
I mustn't have been wobbling you mustn't have been wobbling he mustn't have been wobbling we mustn't have been wobbling you mustn't have been wobbling they mustn't have been wobbling
Interrogative form
Simple form
must I wobble? must you wobble? must he wobble? must we wobble? must you wobble? must they wobble?
V-ing form
must I be wobbling? must you be wobbling? must he be wobbling? must we be wobbling? must you be wobbling? must they be wobbling?
Perfect
must I have wobbled? must you have wobbled? must he have wobbled? must we have wobbled? must you have wobbled? must they have wobbled?
V-ing perfect
must I have been wobbling? must you have been wobbling? must he have been wobbling? must we have been wobbling? must you have been wobbling? must they have been wobbling?
Interro-negative form
Simple form
mustn't I wobble? mustn't you wobble? mustn't he wobble? mustn't we wobble? mustn't you wobble? mustn't they wobble?
V-ing form
mustn't I be wobbling? mustn't you be wobbling? mustn't he be wobbling? mustn't we be wobbling? mustn't you be wobbling? mustn't they be wobbling?
Perfect
mustn't I have wobbled? mustn't you have wobbled? mustn't he have wobbled? mustn't we have wobbled? mustn't you have wobbled? mustn't they have wobbled?
V-ing perfect
mustn't I have been wobbling? mustn't you have been wobbling? mustn't he have been wobbling? mustn't we have been wobbling? mustn't you have been wobbling? mustn't they have been wobbling?