| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has yet to be | 242 |
|
| 2 | has still to be | 49 |
|
| 3 | has also to be | 12 |
|
| 4 | has now to be | 7 |
|
| 5 | has then to be | 6 |
|
| 6 | has therefore to be | 5 |
|
