| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] [prep] | 82405 |
|
| 2 | [verb] [prep] [v-ing] | 49640 |
|
| 3 | is [prep] [v-ing] | 2583 |
|
| 4 | is [verb] [v-ing] | 801 |
|
