| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] what [be] [verb] | 32 |
|
| 2 | could [vb infin] [Wh det] [be] [verb] | 32 |
|
| 3 | could [vb infin] [Wh det] be [verb] | 32 |
|
| 4 | could [vb infin] [Wh det] was [verb] | 29 |
|
| 5 | could [vb infin] [Wh det] [was/were] [verb] | 29 |
|
| 6 | could [vb infin] [Wh det] [be] [v-ing] | 20 |
|
| 7 | could see [Wh det] [be] [verb] | 13 |
|
| 8 | could [vb infin] [Wh det] [be] happen | 12 |
|
| 9 | could [vb infin] [Wh det] [be] happening | 11 |
|
| 10 | could [vb infin] [Wh det] [be] [vb pp] | 10 |
|
| 11 | could [vb infin] [Wh det] [be] go | 7 |
|
| 12 | could [vb infin] [Wh det] [be] going | 7 |
|
