| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] to be | 4613 |
|
| 2 | [vb mod] to [be] | 4613 |
|
| 3 | [vb mod] to [be] | 4612 |
|
| 4 | [vb mod] to be | 4612 |
|
| 5 | used to [be] | 2739 |
|
| 6 | ought to [be] | 1859 |
|
