| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [am/are] [v-ing] [prep] be | 1579 |
|
| 2 | [am/are] [v-ing] [prep] [v-ing] | 422 |
|
| 3 | [v-ing] [prep] be [v-ing] | 396 |
|
| 4 | [am/are] [v-ing] be [v-ing] | 104 |
|
| 5 | [am/are] [prep] be [v-ing] | 6 |
|
