English verb conjugation
MUST UNDERPRAISE

Regular verb: underpraise - underpraised - underpraised

Affirmation

Simple form	V-ing form
I must underpraise you must underpraise she must underpraise we must underpraise you must underpraise they must underpraise	I must be underpraising you must be underpraising she must be underpraising we must be underpraising you must be underpraising they must be underpraising
Perfect	V-ing perfect
I must have underpraised you must have underpraised she must have underpraised we must have underpraised you must have underpraised they must have underpraised	I must have been underpraising you must have been underpraising she must have been underpraising we must have been underpraising you must have been underpraising they must have been underpraising

Negation

Simple form	V-ing form
I mustn't underpraise you mustn't underpraise she mustn't underpraise we mustn't underpraise you mustn't underpraise they mustn't underpraise	I mustn't be underpraising you mustn't be underpraising she mustn't be underpraising we mustn't be underpraising you mustn't be underpraising they mustn't be underpraising
Perfect	V-ing perfect
I mustn't have underpraised you mustn't have underpraised she mustn't have underpraised we mustn't have underpraised you mustn't have underpraised they mustn't have underpraised	I mustn't have been underpraising you mustn't have been underpraising she mustn't have been underpraising we mustn't have been underpraising you mustn't have been underpraising they mustn't have been underpraising

Interrogative form

Simple form	V-ing form
must I underpraise? must you underpraise? must she underpraise? must we underpraise? must you underpraise? must they underpraise?	must I be underpraising? must you be underpraising? must she be underpraising? must we be underpraising? must you be underpraising? must they be underpraising?
Perfect	V-ing perfect
must I have underpraised? must you have underpraised? must she have underpraised? must we have underpraised? must you have underpraised? must they have underpraised?	must I have been underpraising? must you have been underpraising? must she have been underpraising? must we have been underpraising? must you have been underpraising? must they have been underpraising?

Interro-negative form

Simple form	V-ing form
mustn't I underpraise? mustn't you underpraise? mustn't she underpraise? mustn't we underpraise? mustn't you underpraise? mustn't they underpraise?	mustn't I be underpraising? mustn't you be underpraising? mustn't she be underpraising? mustn't we be underpraising? mustn't you be underpraising? mustn't they be underpraising?
Perfect	V-ing perfect
mustn't I have underpraised? mustn't you have underpraised? mustn't she have underpraised? mustn't we have underpraised? mustn't you have underpraised? mustn't they have underpraised?	mustn't I have been underpraising? mustn't you have been underpraising? mustn't she have been underpraising? mustn't we have been underpraising? mustn't you have been underpraising? mustn't they have been underpraising?