| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there [modal v] be a | 3553 |
|
| 2 | [pron] must be a | 713 |
|
| 3 | there must be [art] | 536 |
|
| 4 | there must be [art] | 536 |
|
| 5 | there must be a | 463 |
|
| 6 | there must be a | 388 |
|
| 7 | there must [be] a | 388 |
|
| 8 | [ex0] must be a | 388 |
|
