| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | remains to be [vb pp] whether | 88 |
|
| 2 | remains [prep] be [vb pp] whether | 88 |
|
| 3 | remains [prep] be [vb pp] whether | 88 |
|
| 4 | remains [prep] be seen whether | 81 |
|
