| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [pron] used to [be] a | 19 |
|
| 2 | [noun] there used to [be] [art] | 14 |
|
| 3 | [noun] there [modal v] to [be] a | 14 |
|
| 4 | [noun] there used [prep] [be] a | 13 |
|
