| I | concentrate |
|---|---|
| you | concentrate |
| he/she/it | concentrates |
| we | concentrate |
| you | concentrate |
| they | concentrate |
| I | concentrated |
|---|---|
| you | concentrated |
| he/she/it | concentrated |
| we | concentrated |
| you | concentrated |
| they | concentrated |
| I | have | concentrated |
|---|---|---|
| you | have | concentrated |
| he/she/it | has | concentrated |
| we | have | concentrated |
| you | have | concentrated |
| they | have | concentrated |
| I | had | concentrated |
|---|---|---|
| you | had | concentrated |
| he/she/it | had | concentrated |
| we | had | concentrated |
| you | had | concentrated |
| they | had | concentrated |
单语范例（未经PONS编辑处理）
The festival concentrates on exploration, the environment and knowledge of the sea and under the sea.
en.wikipedia.org Simply put, leg theory involves concentrating the bowling attack at or near the line of leg stump.
en.wikipedia.org Doubling health spending and concentrating on its poorest areas halved maternal mortality between 1998 and 2006.
en.wikipedia.org This ensemble concentrates on building the necessary technical skills for an advanced performance level.
en.wikipedia.org His research concentrates on empirical evidence and economic theory in order to help design more effective government policies.
en.wikipedia.org