| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there [vb mod] to be | 431 |
|
| 2 | [ex0] [vb mod] to be | 431 |
|
| 3 | [ex0] used to be | 341 |
|
| 4 | [ex0] ought to be | 90 |
|
