I. concern [kənˈsɜːn] 动词 trans
II. concern [kənˈsɜːn] 名词
| I | concern | 
|---|---|
| you | concern | 
| he/she/it | concerns | 
| we | concern | 
| you | concern | 
| they | concern | 
| I | concerned | 
|---|---|
| you | concerned | 
| he/she/it | concerned | 
| we | concerned | 
| you | concerned | 
| they | concerned | 
| I | have | concerned | 
|---|---|---|
| you | have | concerned | 
| he/she/it | has | concerned | 
| we | have | concerned | 
| you | have | concerned | 
| they | have | concerned | 
| I | had | concerned | 
|---|---|---|
| you | had | concerned | 
| he/she/it | had | concerned | 
| we | had | concerned | 
| you | had | concerned | 
| they | had | concerned | 
