| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [vb mod] to be | 303 |
|
| 2 | they [modal v] to be | 303 |
|
| 3 | they used to be | 206 |
|
| 4 | they used to be | 206 |
|
| 5 | they ought to be | 97 |
|
| 6 | they ought to be | 97 |
|
