I birl you birl he birls we birl you birl they birl
Present continuous
I am birling you are birling he is birling we are birling you are birling they are birling
Preterite
I birled you birled he birled we birled you birled they birled
Preterite continuous
I was birling you were birling he was birling we were birling you were birling they were birling
Present perfect
I have birled you have birled he has birled we have birled you have birled they have birled
Present perfect continuous
I have been birling you have been birling he has been birling we have been birling you have been birling they have been birling
Pluperfect
I had birled you had birled he had birled we had birled you had birled they had birled
Pluperfect continuous
I had been birling you had been birling he had been birling we had been birling you had been birling they had been birling
Future
I will birl you will birl he will birl we will birl you will birl they will birl
Future continuous
I will be birling you will be birling he will be birling we will be birling you will be birling they will be birling
Future perfect
I will have birled you will have birled he will have birled we will have birled you will have birled they will have birled
Future perfect continuous
I will have been birling you will have been birling he will have been birling we will have been birling you will have been birling they will have been birling
Conditional
Present
I would birl you would birl he would birl we would birl you would birl they would birl
Present continuous
I would be birling you would be birling he would be birling we would be birling you would be birling they would be birling
Past
I would have birled you would have birled he would have birled we would have birled you would have birled they would have birled
Past continuous
I would have been birling you would have been birling he would have been birling we would have been birling you would have been birling they would have been birling