| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there could [verb] be | 73 |
|
| 2 | there could [verb] been | 73 |
|
| 3 | there could [vb infin] be | 73 |
|
| 4 | there could have be | 72 |
|
| 5 | there could have be | 70 |
|
