happen [ˈhæpən] 动词 不及物动词
| I | happen |
|---|---|
| you | happen |
| he/she/it | happens |
| we | happen |
| you | happen |
| they | happen |
| I | happened |
|---|---|
| you | happened |
| he/she/it | happened |
| we | happened |
| you | happened |
| they | happened |
| I | have | happened |
|---|---|---|
| you | have | happened |
| he/she/it | has | happened |
| we | have | happened |
| you | have | happened |
| they | have | happened |
| I | had | happened |
|---|---|---|
| you | had | happened |
| he/she/it | had | happened |
| we | had | happened |
| you | had | happened |
| they | had | happened |