I do not stem you do not stem she does not stem we do not stem you do not stem they do not stem
Present continuous
I am not stemming you are not stemming she is not stemming we are not stemming you are not stemming they are not stemming
Preterite
I did not stem you did not stem she did not stem we did not stem you did not stem they did not stem
Preterite continuous
I was not stemming you were not stemming she was not stemming we were not stemming you were not stemming they were not stemming
Present perfect
I have not stemmed you have not stemmed she has not stemmed we have not stemmed you have not stemmed they have not stemmed
Present perfect continuous
I have not been stemming you have not been stemming she has not been stemming we have not been stemming you have not been stemming they have not been stemming
Pluperfect
I had not stemmed you had not stemmed she had not stemmed we had not stemmed you had not stemmed they had not stemmed
Pluperfect continuous
I had not been stemming you had not been stemming she had not been stemming we had not been stemming you had not been stemming they had not been stemming
Future
I will not stem you will not stem she will not stem we will not stem you will not stem they will not stem
Future continuous
I will not be stemming you will not be stemming she will not be stemming we will not be stemming you will not be stemming they will not be stemming
Future perfect
I will not have stemmed you will not have stemmed she will not have stemmed we will not have stemmed you will not have stemmed they will not have stemmed
Future perfect continuous
I will not have been stemming you will not have been stemming she will not have been stemming we will not have been stemming you will not have been stemming they will not have been stemming
Conditional
Present
I would not stem you would not stem she would not stem we would not stem you would not stem they would not stem
Present continuous
I would not be stemming you would not be stemming she would not be stemming we would not be stemming you would not be stemming they would not be stemming
Past
I would not have stemmed you would not have stemmed she would not have stemmed we would not have stemmed you would not have stemmed they would not have stemmed
Past continuous
I would not have been stemming you would not have been stemming she would not have been stemming we would not have been stemming you would not have been stemming they would not have been stemming