| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] used to [be] | 1772 |
|
| 2 | [pron] [noun] to [be] | 1552 |
|
| 3 | [noun] used to [be] | 532 |
|
| 4 | [pron] [noun] used to | 59 |
|
