I am skiing you are skiing he is skiing we are skiing you are skiing they are skiing
Preterite
I skied you skied he skied we skied you skied they skied
Preterite continuous
I was skiing you were skiing he was skiing we were skiing you were skiing they were skiing
Present perfect
I have skied you have skied he has skied we have skied you have skied they have skied
Present perfect continuous
I have been skiing you have been skiing he has been skiing we have been skiing you have been skiing they have been skiing
Pluperfect
I had skied you had skied he had skied we had skied you had skied they had skied
Pluperfect continuous
I had been skiing you had been skiing he had been skiing we had been skiing you had been skiing they had been skiing
Future
I will ski you will ski he will ski we will ski you will ski they will ski
Future continuous
I will be skiing you will be skiing he will be skiing we will be skiing you will be skiing they will be skiing
Future perfect
I will have skied you will have skied he will have skied we will have skied you will have skied they will have skied
Future perfect continuous
I will have been skiing you will have been skiing he will have been skiing we will have been skiing you will have been skiing they will have been skiing
Conditional
Present
I would ski you would ski he would ski we would ski you would ski they would ski
Present continuous
I would be skiing you would be skiing he would be skiing we would be skiing you would be skiing they would be skiing
Past
I would have skied you would have skied he would have skied we would have skied you would have skied they would have skied
Past continuous
I would have been skiing you would have been skiing he would have been skiing we would have been skiing you would have been skiing they would have been skiing