| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to be kept [adj] | 95 |
|
| 2 | to be kept [adj] | 92 |
|
| 3 | to be [vb pp] open | 14 |
|
| 4 | to be [verb] open | 14 |
|
| 5 | to [be] kept open | 6 |
|
| 6 | to be kept open | 6 |
|
| 7 | [prep] be kept open | 6 |
|
| 8 | to be kept open | 6 |
|
| 9 | to [be] kept open | 6 |
|
| 10 | to be keep open | 6 |
|
