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