| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it used to [be] | 501 |
|
| 2 | it used to be | 501 |
|
| 3 | it used to [be] | 501 |
|
| 4 | it used to [be] | 501 |
|
| 5 | it used to [be] | 501 |
|
| 6 | it used to be | 501 |
|
