| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [v-ing] [adv] [prep] | 1334 |
|
| 2 | been [v-ing] [prep] year | 85 |
|
| 3 | [v-ing] [adv] [prep] year | 72 |
|
| 4 | been [adv] [prep] year | 36 |
|
