| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] from a | 17 |
|
| 2 | have been suffering from a | 11 |
|
| 3 | had been [v-ing] from a | 6 |
|
| 4 | has been [v-ing] from a | 5 |
|
