| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [pron] [modal v] to [be] | 104 |
|
| 2 | [Wh det] [pron] [vb mod] to [be] | 104 |
|
| 3 | [pron] [pron] used to [be] | 80 |
|
| 4 | [Wh det] [pron] used to [be] | 63 |
|
| 5 | [Wh det] [pron] used [prep] [be] | 63 |
|
