| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [been] [v-ing] for some year | 9 |
|
| 2 | have [been] [v-ing] for some year | 9 |
|
| 3 | had [been] [v-ing] for some year | 7 |
|
| 4 | [vb past] [been] [v-ing] for some year | 7 |
|
