| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [prep] | 71140 |
|
| 2 | [v-ing] [prep] [pos pn] | 20356 |
|
| 3 | be [prep] [pos pn] | 10428 |
|
| 4 | be [v-ing] [pos pn] | 9683 |
|
