| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] used to [be] | 1772 |
|
| 2 | [pers pn] used to [be] | 1171 |
|
| 3 | they [modal v] to [be] | 303 |
|
| 4 | they used to [be] | 208 |
|
| 5 | they used [prep] [be] | 206 |
|
