| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [verb] [art] | 1383 |
|
| 2 | had been [v-ing] [art] | 625 |
|
| 3 | have been reading [art] | 30 |
|
| 4 | [verb] been reading [art] | 30 |
|
| 5 | had been read [art] | 13 |
|
| 6 | had be reading [art] | 13 |
|
| 7 | [vb past] been reading [art] | 13 |
|
| 8 | had [be] reading [art] | 13 |
|
| 9 | had [been] reading [art] | 12 |
|
