| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | used to [be] [noun] | 170 |
|
| 2 | [vb mod] to [be] [noun pl] | 47 |
|
| 3 | [modal v] to [be] [noun pl] | 47 |
|
| 4 | used [prep] [be] [noun pl] | 38 |
|
| 5 | used to [be] [noun pl] | 38 |
|
