| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be kept [prep] a [noun] | 212 |
|
| 2 | be [prep] a long [noun] | 61 |
|
| 3 | kept [prep] a long [noun] | 7 |
|
| 4 | be kept [prep] a long | 7 |
|
