could appraise
Regular verb: appraise - appraised- appraised

Affirmation 	
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I could appraise
you could appraise
he could appraise
we could appraise
you could appraise
they could appraise 	I could be appraising
you could be appraising
he could be appraising
we could be appraising
you could be appraising
they could be appraising	I could have appraised
you could have appraised
he could have appraised
we could have appraised
you could have appraised
they could have appraised	I could have been appraising
you could have been appraising
he could have been appraising
we could have been appraising
you could have been appraising
they could have been appraising	

Negation 	
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I could not appraise
you could not appraise
he could not appraise
we could not appraise
you could not appraise
they could not appraise 	I could not be appraising
you could not be appraising
he could not be appraising
we could not be appraising
you could not be appraising
they could not be appraising	I could not have appraised
you could not have appraised
he could not have appraised
we could not have appraised
you could not have appraised
they could not have appraised	I could not have been appraising
you could not have been appraising
he could not have been appraising
we could not have been appraising
you could not have been appraising
they could not have been appraising	

Interrogative form 	
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could I appraise?
could you appraise?
could he appraise?
could we appraise?
could you appraise?
could they appraise? 	could I be appraising?
could you be appraising?
could he be appraising?
could we be appraising?
could you be appraising?
could they be appraising? 	could I have appraised?
could you have appraised?
could he have appraised?
could we have appraised?
could you have appraised?
could they have appraised? 	could I have been appraising?
could you have been appraising?
could he have been appraising?
could we have been appraising?
could you have been appraising?
could they have been appraising? 	

Interro-negative form 	
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could I not appraise?
could you not appraise?
could he not appraise?
could we not appraise?
could you not appraise?
could they not appraise? 	could I not be appraising?
could you not be appraising?
could he not be appraising?
could we not be appraising?
could you not be appraising?
could they not be appraising? 	could I not have appraised?
could you not have appraised?
could he not have appraised?
could we not have appraised?
could you not have appraised?
could they not have appraised? 	could I not have been appraising?
could you not have been appraising?
could he not have been appraising?
could we not have been appraising?
could you not have been appraising?
could they not have been appraising?