| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] [pers pn] have been driving | 9 |
|
| 2 | [subord] [pers pn] [vb past] been driving | 7 |
|
| 3 | [subord] [pers pn] had been driving | 5 |
|
