| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have [adv] to be | 43 |
|
| 2 | [Wh det] have yet to be | 30 |
|
| 3 | [Wh det] have [adv] to be | 20 |
|
| 4 | [Wh det] has [adv] to be | 18 |
|
| 5 | [Wh det] had [adv] to be | 9 |
|
| 6 | [Wh det] have still to be | 6 |
|
