| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [prep] | 135596 |
|
| 2 | [vb pp] [prep] [v-ing] | 25474 |
|
| 3 | be [vb pp] [v-ing] | 1627 |
|
| 4 | be [prep] [v-ing] | 780 |
|
