English verb conjugation
MUST WELSH

Regular verb: welsh - welshed - welshed

Affirmation

Simple form	V-ing form
I must welsh you must welsh he must welsh we must welsh you must welsh they must welsh	I must be welshing you must be welshing he must be welshing we must be welshing you must be welshing they must be welshing
Perfect	V-ing perfect
I must have welshed you must have welshed he must have welshed we must have welshed you must have welshed they must have welshed	I must have been welshing you must have been welshing he must have been welshing we must have been welshing you must have been welshing they must have been welshing

Negation

Simple form	V-ing form
I mustn't welsh you mustn't welsh he mustn't welsh we mustn't welsh you mustn't welsh they mustn't welsh	I mustn't be welshing you mustn't be welshing he mustn't be welshing we mustn't be welshing you mustn't be welshing they mustn't be welshing
Perfect	V-ing perfect
I mustn't have welshed you mustn't have welshed he mustn't have welshed we mustn't have welshed you mustn't have welshed they mustn't have welshed	I mustn't have been welshing you mustn't have been welshing he mustn't have been welshing we mustn't have been welshing you mustn't have been welshing they mustn't have been welshing

Interrogative form

Simple form	V-ing form
must I welsh? must you welsh? must he welsh? must we welsh? must you welsh? must they welsh?	must I be welshing? must you be welshing? must he be welshing? must we be welshing? must you be welshing? must they be welshing?
Perfect	V-ing perfect
must I have welshed? must you have welshed? must he have welshed? must we have welshed? must you have welshed? must they have welshed?	must I have been welshing? must you have been welshing? must he have been welshing? must we have been welshing? must you have been welshing? must they have been welshing?

Interro-negative form

Simple form	V-ing form
mustn't I welsh? mustn't you welsh? mustn't he welsh? mustn't we welsh? mustn't you welsh? mustn't they welsh?	mustn't I be welshing? mustn't you be welshing? mustn't he be welshing? mustn't we be welshing? mustn't you be welshing? mustn't they be welshing?
Perfect	V-ing perfect
mustn't I have welshed? mustn't you have welshed? mustn't he have welshed? mustn't we have welshed? mustn't you have welshed? mustn't they have welshed?	mustn't I have been welshing? mustn't you have been welshing? mustn't he have been welshing? mustn't we have been welshing? mustn't you have been welshing? mustn't they have been welshing?