| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] long have they be | 6 |
|
| 2 | [Wh adv] long have they been | 6 |
|
| 3 | [Wh adv] long have they [be] | 6 |
|
| 4 | [Wh adv] long have they [been] | 6 |
|
