| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] to be do | 78 |
|
| 2 | [modal v] to be do | 78 |
|
| 3 | ought to be do | 72 |
|
| 4 | ought to be do | 72 |
|
| 5 | [modal v] to be doing | 40 |
|
| 6 | [modal v] to be done | 36 |
|
| 7 | used to be do | 6 |
|
| 8 | used to be do | 6 |
|
