| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [verb] [prep] | 88780 |
|
| 2 | [is] [vb pp] [prep] | 72850 |
|
| 3 | [be] kept [prep] | 1618 |
|
| 4 | [is] keep [prep] | 191 |
|
| 5 | [is] kept [prep] | 173 |
|
