| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] to be [prep] | 336 |
|
| 2 | used to be [prep] | 232 |
|
| 3 | used [prep] be [prep] | 232 |
|
| 4 | used to [be] [prep] | 232 |
|
| 5 | used [prep] be [prep] | 232 |
|
