| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [v-ing] [prep] | 9094 |
|
| 2 | [be] [v-ing] on | 5747 |
|
| 3 | be [v-ing] on | 5746 |
|
| 4 | is [verb] on | 5478 |
|
| 5 | [is] [v-ing] on | 1009 |
|
