| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [verb] | 37993 |
|
| 2 | [verb] been [v-ing] | 19916 |
|
| 3 | have been [v-ing] | 19902 |
|
| 4 | [vb past] been [v-ing] | 6932 |
|
| 5 | had [be] [v-ing] | 5826 |
|
| 6 | had be [v-ing] | 5826 |
|
| 7 | had [been] [v-ing] | 5819 |
|
