| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been doing so for | 8 |
|
| 2 | have been doing so for | 8 |
|
| 3 | had been [v-ing] so for | 6 |
|
| 4 | had been [verb] so for | 6 |
|
| 5 | had been doing so [prep] | 5 |
|
| 6 | had [be] doing so for | 5 |
|
| 7 | [vb past] been doing so for | 5 |
|
| 8 | had been doing [adv] for | 5 |
|
| 9 | had been do so for | 5 |
|
| 10 | had [been] doing so for | 5 |
|
| 11 | had be doing so for | 5 |
|
