| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [v-ing] [prep] | 8820 |
|
| 2 | [v-ing] [prep] work | 612 |
|
| 3 | is [prep] work | 74 |
|
| 4 | is [v-ing] work | 12 |
|
