could appraise
Regular verb: appraise - appraised- appraised

Affirmation 	
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I could appraise
you could appraise
she could appraise
we could appraise
you could appraise
they could appraise 	I could be appraising
you could be appraising
she could be appraising
we could be appraising
you could be appraising
they could be appraising	I could have appraised
you could have appraised
she 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
she 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
she 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
she 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
she 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
she 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 she appraise?
could we appraise?
could you appraise?
could they appraise? 	could I be appraising?
could you be appraising?
could she be appraising?
could we be appraising?
could you be appraising?
could they be appraising? 	could I have appraised?
could you have appraised?
could she 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 she 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 she 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 she 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 she 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 she not have been appraising?
could we not have been appraising?
could you not have been appraising?
could they not have been appraising?