English verb conjugation
MUST KEELHAUL

Regular verb: keelhaul - keelhauled - keelhauled

Affirmation

Simple form	V-ing form
I must keelhaul you must keelhaul he must keelhaul we must keelhaul you must keelhaul they must keelhaul	I must be keelhauling you must be keelhauling he must be keelhauling we must be keelhauling you must be keelhauling they must be keelhauling
Perfect	V-ing perfect
I must have keelhauled you must have keelhauled he must have keelhauled we must have keelhauled you must have keelhauled they must have keelhauled	I must have been keelhauling you must have been keelhauling he must have been keelhauling we must have been keelhauling you must have been keelhauling they must have been keelhauling

Negation

Simple form	V-ing form
I mustn't keelhaul you mustn't keelhaul he mustn't keelhaul we mustn't keelhaul you mustn't keelhaul they mustn't keelhaul	I mustn't be keelhauling you mustn't be keelhauling he mustn't be keelhauling we mustn't be keelhauling you mustn't be keelhauling they mustn't be keelhauling
Perfect	V-ing perfect
I mustn't have keelhauled you mustn't have keelhauled he mustn't have keelhauled we mustn't have keelhauled you mustn't have keelhauled they mustn't have keelhauled	I mustn't have been keelhauling you mustn't have been keelhauling he mustn't have been keelhauling we mustn't have been keelhauling you mustn't have been keelhauling they mustn't have been keelhauling

Interrogative form

Simple form	V-ing form
must I keelhaul? must you keelhaul? must he keelhaul? must we keelhaul? must you keelhaul? must they keelhaul?	must I be keelhauling? must you be keelhauling? must he be keelhauling? must we be keelhauling? must you be keelhauling? must they be keelhauling?
Perfect	V-ing perfect
must I have keelhauled? must you have keelhauled? must he have keelhauled? must we have keelhauled? must you have keelhauled? must they have keelhauled?	must I have been keelhauling? must you have been keelhauling? must he have been keelhauling? must we have been keelhauling? must you have been keelhauling? must they have been keelhauling?

Interro-negative form

Simple form	V-ing form
mustn't I keelhaul? mustn't you keelhaul? mustn't he keelhaul? mustn't we keelhaul? mustn't you keelhaul? mustn't they keelhaul?	mustn't I be keelhauling? mustn't you be keelhauling? mustn't he be keelhauling? mustn't we be keelhauling? mustn't you be keelhauling? mustn't they be keelhauling?
Perfect	V-ing perfect
mustn't I have keelhauled? mustn't you have keelhauled? mustn't he have keelhauled? mustn't we have keelhauled? mustn't you have keelhauled? mustn't they have keelhauled?	mustn't I have been keelhauling? mustn't you have been keelhauling? mustn't he have been keelhauling? mustn't we have been keelhauling? mustn't you have been keelhauling? mustn't they have been keelhauling?