| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | used to [be] [prep] | 232 |
|
| 2 | [modal v] to [be] in | 139 |
|
| 3 | [vb mod] to [be] in | 139 |
|
| 4 | used to [be] in | 92 |
|
| 5 | used [prep] [be] in | 92 |
|
