I function you function he functions we function you function they function
Present continuous
I am functioning you are functioning he is functioning we are functioning you are functioning they are functioning
Preterite
I functioned you functioned he functioned we functioned you functioned they functioned
Preterite continuous
I was functioning you were functioning he was functioning we were functioning you were functioning they were functioning
Present perfect
I have functioned you have functioned he has functioned we have functioned you have functioned they have functioned
Present perfect continuous
I have been functioning you have been functioning he has been functioning we have been functioning you have been functioning they have been functioning
Pluperfect
I had functioned you had functioned he had functioned we had functioned you had functioned they had functioned
Pluperfect continuous
I had been functioning you had been functioning he had been functioning we had been functioning you had been functioning they had been functioning
Future
I will function you will function he will function we will function you will function they will function
Future continuous
I will be functioning you will be functioning he will be functioning we will be functioning you will be functioning they will be functioning
Future perfect
I will have functioned you will have functioned he will have functioned we will have functioned you will have functioned they will have functioned
Future perfect continuous
I will have been functioning you will have been functioning he will have been functioning we will have been functioning you will have been functioning they will have been functioning
Conditional
Present
I would function you would function he would function we would function you would function they would function
Present continuous
I would be functioning you would be functioning he would be functioning we would be functioning you would be functioning they would be functioning
Past
I would have functioned you would have functioned he would have functioned we would have functioned you would have functioned they would have functioned
Past continuous
I would have been functioning you would have been functioning he would have been functioning we would have been functioning you would have been functioning they would have been functioning