| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have yet to be [vb pp] | 25 |
|
| 2 | which have [adv] to be [vb pp] | 18 |
|
| 3 | which has [adv] to be [vb pp] | 12 |
|
| 4 | which had [adv] to be [vb pp] | 6 |
|
| 5 | which have still to be [vb pp] | 5 |
|
