| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] [noun sg] to be | 1056 |
|
| 2 | [noun sg] used to be | 278 |
|
| 3 | [det] used to be | 49 |
|
| 4 | [det] [noun sg] used to | 18 |
|
