| I | duff |
|---|---|
| you | duff |
| he/she/it | duffs |
| we | duff |
| you | duff |
| they | duff |
| I | duffed |
|---|---|
| you | duffed |
| he/she/it | duffed |
| we | duffed |
| you | duffed |
| they | duffed |
| I | have | duffed |
|---|---|---|
| you | have | duffed |
| he/she/it | has | duffed |
| we | have | duffed |
| you | have | duffed |
| they | have | duffed |
| I | had | duffed |
|---|---|---|
| you | had | duffed |
| he/she/it | had | duffed |
| we | had | duffed |
| you | had | duffed |
| they | had | duffed |
无例句可用
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单语范例（未经PONS编辑处理）
The candidate could turn out to be a lead-swinging duffer or a high-productivity diamond.
www.independent.co.uk Duffer added that season 1 takes place over the course of just six or seven days.
www.cnet.com He is an aspiring gang lord whose overall appearance is fairly don-like but is actually is quite a duffer.
en.wikipedia.org The reports proved to be exaggerated, with gold only to be found in a small area and the field was labeled a duffer and the diggers moved elsewhere.
en.wikipedia.org Rather than being a bunch of well-meaning duffers led by pompous twits, most were former servicemen with sound military knowledge.
www.dailymail.co.uk