| I | shell |
|---|---|
| you | shell |
| he/she/it | shells |
| we | shell |
| you | shell |
| they | shell |
| I | shelled |
|---|---|
| you | shelled |
| he/she/it | shelled |
| we | shelled |
| you | shelled |
| they | shelled |
| I | have | shelled |
|---|---|---|
| you | have | shelled |
| he/she/it | has | shelled |
| we | have | shelled |
| you | have | shelled |
| they | have | shelled |
| I | had | shelled |
|---|---|---|
| you | had | shelled |
| he/she/it | had | shelled |
| we | had | shelled |
| you | had | shelled |
| they | had | shelled |
单语范例（未经PONS编辑处理）
The mid-level boss is a robotic woman jutting out of a snail shell.
en.wikipedia.org The species is particularly characterized by its double columellar processes in the apertural dentition, a splendid discriminating character in shell morphology in this group.
en.wikipedia.org It shelters itself in its shell, then strikes back with spouts of water at every opportunity.
en.wikipedia.org In many high-tech businesses, attrition of talented human resources often means an empty shell is left behind for the new owner.
en.wikipedia.org The periphery of the shell is angulated, and tuberculate, as well as the body whorl below it.
en.wikipedia.org