| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be doing [be] [v-ing] | 156 |
|
| 2 | be [be] [v-ing] [prep] | 28 |
|
| 3 | doing [be] [v-ing] [prep] | 25 |
|
| 4 | be doing [be] [prep] | 14 |
|
