| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | know [Wh adv] long [pers pn] have | 15 |
|
| 2 | know how long [pers pn] have | 15 |
|
| 3 | know [Wh adv] long [pers pn] had | 5 |
|
| 4 | know [Wh adv] long i have | 5 |
|
| 5 | know [Wh adv] long he have | 5 |
|
