| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] [conj] [v-ing] a | 121 |
|
| 2 | could [be] [verb] [conj] [v-ing] | 76 |
|
| 3 | could [be] [verb] [conj] a | 41 |
|
| 4 | could [be] [verb] [v-ing] a | 5 |
|
