| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which used [prep] be | 69 |
|
| 2 | which used [prep] [be] | 69 |
|
| 3 | which used [prep] be | 69 |
|
| 4 | which used to [be] | 69 |
|
| 5 | which used [prep] [be] | 69 |
|
| 6 | which used to [be] | 69 |
|
