| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] what they have do | 17 |
|
| 2 | [to-vb] what they have do | 12 |
|
| 3 | [to-vb] what they have done | 11 |
|
| 4 | [to-vb] what they have to do | 6 |
|
