| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] there used to [be] | 40 |
|
| 2 | then [pron] used to [be] | 30 |
|
| 3 | then there [modal v] to [be] | 20 |
|
| 4 | then there used [prep] [be] | 19 |
|
