| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] to [be] [art] | 788 |
|
| 2 | [modal v] to [be] [art] | 788 |
|
| 3 | used [prep] [be] [art] | 649 |
|
| 4 | used to [be] [art] | 648 |
|
| 5 | used to [be] [art] | 648 |
|
