| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] to [be] [noun] [noun] | 51 |
|
| 2 | used [prep] [be] [noun] [noun] | 49 |
|
| 3 | used [prep] [be] [noun] [noun] | 49 |
|
| 4 | used to [be] [noun] [noun] | 49 |
|
