| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] on [prep] | 1394 |
|
| 2 | has be [v-ing] [prep] | 1064 |
|
| 3 | has be [v-ing] on | 112 |
|
| 4 | has be on [prep] | 6 |
|
