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  Gainsay - PRESENT PERFECT SIMPLE     gain-said 
Indicative Interrogative Affirmative Negative
 i have gainsaid have  i gainsaid?  yes,  i have no,  i have not
 you have gainsaid have  you gainsaid? yes,  you have no,  you have not
 he has gainsaid has  he gainsaid? yes,  he has no,  he has not
 she has gainsaid has  she gainsaid? yes,  she has no,  she has not
 it has gainsaid has  it gainsaid? yes,  it has no,  it has not
 we have gainsaid have  we gainsaid? yes,  we have no,  we have not
 you have gainsaid have  you gainsaid? yes,  you have no,  you have not
 they have gainsaid have  they gainsaid? yes,  they have no,  they have not
  gainsaid   gainsaid   gainsaid   gainsaid
  Gainsay - PAST PERFECT SIMPLE     gain-said 
Indicative Interrogative Affirmative Negative
 i had gainsaid had  i gainsaid? yes,  i had no,  i had not
 you had gainsaid had  you gainsaid? yes,  you had no,  you had not
 he had gainsaid had  he gainsaid? yes,  he had no,  he had not
 she had gainsaid had  she gainsaid? yes,  she had no,  she had not
 it had gainsaid had  it gainsaid? yes,  it had no,  it had not
 we had gainsaid had  we gainsaid? yes,  we had no,  we had not
 you had gainsaid had  you gainsaid? yes,  you had no,  you had not
 they had gainsaid had  they gainsaid? yes,  they had no,  they had not
  gainsaid   gainsaid   gainsaid   gainsaid
  Gainsay - FUTURE PERFECT SIMPLE     gain-said 
Indicative Interrogative Affirmative Negative
 i will have gainsaid will  i have gainsaid? yes,  i will have no,  i will not have
 you will have gainsaid will  you have gainsaid? yes,  you will have no,  you will not have
 he will have gainsaid will  he have gainsaid? yes,  he will have no,  he will not have
 she will have gainsaid will  she have gainsaid? yes,  she will have no,  she will not have
 it will have gainsaid will  it have gainsaid? yes,  it will have no,  it will not have
 we will have gainsaid will  we have gainsaid? yes,  we will have no,  we will not have
 you will have gainsaid will  you have gainsaid? yes,  you will have no,  you will not have
 they will have gainsaid will  they have gainsaid? yes,  they will have no,  they will not have
  gainsaid   gainsaid   gainsaid   gainsaid

Gainsay - Simple Tense Gainsay - Continuous Tense Gainsay - Perfect Continuous
  Gainsay  -  PRESENT SIMPLE     gain-say, gain-says 
Indicative Interrogative Affirmative Negative
 i gainsay do  i gainsay? yes,  i do no,  i do not
 you gainsay do  you gainsay? yes,  you do no,  you do not
 he gainsays does  he gainsay? yes,  he does no,  he does not
 she gainsays does  she gainsay? yes,  she does no,  she does not
 it gainsays does  it gainsay? yes,  it does no,  it does not
 we gainsay do  we gainsay? yes,  we do no,  we do not
 you gainsay do  you gainsay? yes,  you do no,  you do not
 they gainsay do  they gainsay? yes,  they do no,  they do not
 gainsay, gainsays   gainsay  gainsay  gainsay
  Gainsay  -  PAST SIMPLE    gain-said, gain-say
Indicative Interrogative Affirmative Negative
 i gainsaid did  i gainsay? yes,  i did  no,  i did  not
 you gainsaid did  you gainsay? yes,  you did no,  you did not
 he gainsaid did  he gainsay? yes,  he did no,  he did not
 she gainsaid did  she gainsay? yes,  she did no,  she did not
 it gainsaid did  it gainsay? yes,  it did no,  it did not
 we gainsaid did  we gainsay? yes,  we did no,  we did not
 you gainsaid did  you gainsay? yes,  you did no,  you did not
 they gainsaid did  they gainsay? yes,  they did no,  they did not
 gainsaid  gainsay  gainsay  gainsay
  Gainsay  -  FUTURE SIMPLE    gain-say 
Indicative Interrogative Affirmative Negative
 i will gainsay will  i gainsay? yes,  i will no,  i will not
 you will gainsay will  you gainsay? yes,  you will no,  you will not
 he will gainsay will  he gainsay? yes,  he will no,  he will not
 she will gainsay will  she gainsay? yes,  she will no,  she will not
 it will gainsay will  it gainsay? yes,  it will no,  it will not
 we will gainsay will  we gainsay? yes,  we will no,  we will not
 you will gainsay will  you gainsay? yes,  you will no,  you will not
 they will gainsay will  they gainsay? yes,  they will no,  they will not
 gainsay  gainsay  gainsay  gainsay

Gainsay - Continuous Tense Gainsay - Perfect Simple Gainsay - Perfect Continuous