| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [n mass] used to be | 13 |
|
| 2 | [n mass] used to be | 13 |
|
| 3 | [n mass] used to [be] | 13 |
|
| 4 | [n mass] used to [be] | 13 |
|
| 5 | [n mass] used to [be] | 13 |
|
| 6 | people used to [be] | 6 |
|
