| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] [v-ing] | 49623 |
|
| 2 | is [prep] [v-ing] | 2583 |
|
| 3 | [verb] is [prep] | 1163 |
|
| 4 | [verb] is [v-ing] | 586 |
|
