| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] [vb mod] [verb] been driving | 8 |
|
| 2 | [pers pn] [modal v] have been driving | 8 |
|
| 3 | [pers pn] [modal v] [vb infin] been driving | 7 |
|
| 4 | [pers pn] [modal v] have been driving | 6 |
|
