| I | stack |
|---|---|
| you | stack |
| he/she/it | stacks |
| we | stack |
| you | stack |
| they | stack |
| I | stacked |
|---|---|
| you | stacked |
| he/she/it | stacked |
| we | stacked |
| you | stacked |
| they | stacked |
| I | have | stacked |
|---|---|---|
| you | have | stacked |
| he/she/it | has | stacked |
| we | have | stacked |
| you | have | stacked |
| they | have | stacked |
| I | had | stacked |
|---|---|---|
| you | had | stacked |
| he/she/it | had | stacked |
| we | had | stacked |
| you | had | stacked |
| they | had | stacked |
单语范例（未经PONS编辑处理）
It has five main floors and seven stack floors (the stacks are not open to the public).
en.wikipedia.org There are many ways to create the ends of a stack.
en.wikipedia.org The video finishes by zooming away from one television stacked among others, next to where the band were performing earlier on in the video.
en.wikipedia.org The trick can also be performed with a stack of coins.
en.wikipedia.org The game ends after the conclusion of one of the last few deals on the tile stack.
en.wikipedia.org