| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [am/are] [v-ing] on | 1252 |
|
| 2 | [am/are] [v-ing] this | 693 |
|
| 3 | [v-ing] on this | 340 |
|
| 4 | [am/are] on this | 47 |
|
