I collapse you collapse he collapses we collapse you collapse they collapse
Present continuous
I am collapsing you are collapsing he is collapsing we are collapsing you are collapsing they are collapsing
Preterite
I collapsed you collapsed he collapsed we collapsed you collapsed they collapsed
Preterite continuous
I was collapsing you were collapsing he was collapsing we were collapsing you were collapsing they were collapsing
Present perfect
I have collapsed you have collapsed he has collapsed we have collapsed you have collapsed they have collapsed
Present perfect continuous
I have been collapsing you have been collapsing he has been collapsing we have been collapsing you have been collapsing they have been collapsing
Pluperfect
I had collapsed you had collapsed he had collapsed we had collapsed you had collapsed they had collapsed
Pluperfect continuous
I had been collapsing you had been collapsing he had been collapsing we had been collapsing you had been collapsing they had been collapsing
Future
I will collapse you will collapse he will collapse we will collapse you will collapse they will collapse
Future continuous
I will be collapsing you will be collapsing he will be collapsing we will be collapsing you will be collapsing they will be collapsing
Future perfect
I will have collapsed you will have collapsed he will have collapsed we will have collapsed you will have collapsed they will have collapsed
Future perfect continuous
I will have been collapsing you will have been collapsing he will have been collapsing we will have been collapsing you will have been collapsing they will have been collapsing
Conditional
Present
I would collapse you would collapse he would collapse we would collapse you would collapse they would collapse
Present continuous
I would be collapsing you would be collapsing he would be collapsing we would be collapsing you would be collapsing they would be collapsing
Past
I would have collapsed you would have collapsed he would have collapsed we would have collapsed you would have collapsed they would have collapsed
Past continuous
I would have been collapsing you would have been collapsing he would have been collapsing we would have been collapsing you would have been collapsing they would have been collapsing