can1 <过去式 could; 否定式 can not or cannot or can't> [强 kæn; 弱 kən] 动词 助动词
| I | can |
|---|---|
| you | can |
| he/she/it | can |
| we | can |
| you | can |
| they | can |
| I | could |
|---|---|
| you | could |
| he/she/it | could |
| we | could |
| you | could |
| they | could |
| I | have | been able to |
|---|---|---|
| you | have | been able to |
| he/she/it | has | been able to |
| we | have | been able to |
| you | have | been able to |
| they | have | been able to |
| I | had | been able to |
|---|---|---|
| you | had | been able to |
| he/she/it | had | been able to |
| we | had | been able to |
| you | had | been able to |
| they | had | been able to |