| I | cluster |
|---|---|
| you | cluster |
| he/she/it | clusters |
| we | cluster |
| you | cluster |
| they | cluster |
| I | clustered |
|---|---|
| you | clustered |
| he/she/it | clustered |
| we | clustered |
| you | clustered |
| they | clustered |
| I | have | clustered |
|---|---|---|
| you | have | clustered |
| he/she/it | has | clustered |
| we | have | clustered |
| you | have | clustered |
| they | have | clustered |
| I | had | clustered |
|---|---|---|
| you | had | clustered |
| he/she/it | had | clustered |
| we | had | clustered |
| you | had | clustered |
| they | had | clustered |
单语范例（未经PONS编辑处理）
Some believe that cluttering behavior can be symptomatic of deeper issues.
en.wikipedia.org The interior is as spartan as the exterior, with upright geometric furniture and an avoidance of clutter.
en.wikipedia.org This is designed to protect consumers from potentially irresponsible advice and to prevent the court system from cluttering by unmeritorious cases.
en.wikipedia.org The ground strongly reflects the radar energy while the target relatively weakly reflects the radar energy, creating confusing clutter on the radar screen.
en.wikipedia.org Ground clutter generally appears in a circular region within a radius of about 25 miles near ground-based radar.
en.wikipedia.org