| I | rat |
|---|---|
| you | rat |
| he/she/it | rats |
| we | rat |
| you | rat |
| they | rat |
| I | ratted |
|---|---|
| you | ratted |
| he/she/it | ratted |
| we | ratted |
| you | ratted |
| they | ratted |
| I | have | ratted |
|---|---|---|
| you | have | ratted |
| he/she/it | has | ratted |
| we | have | ratted |
| you | have | ratted |
| they | have | ratted |
| I | had | ratted |
|---|---|---|
| you | had | ratted |
| he/she/it | had | ratted |
| we | had | ratted |
| you | had | ratted |
| they | had | ratted |
单语范例（未经PONS编辑处理）
It is also currently home to the zoo's Madagascan giant jumping rats.
en.wikipedia.org The rats are socialized and then trained through principles of operant conditioning.
en.wikipedia.org Contrary to popular belief, rats did not directly start the spread of the bubonic plague.
en.wikipedia.org Significant stress-related decreases in the volume of the hippocampus can be seen in rats, and longer depression duration is also linked to hippocampal atrophy.
en.wikipedia.org For example, porcine and rat galanin inhibit glucose-induced insulin secretion in rats and dogs but have no effect on insulin secretion in humans.
en.wikipedia.org