| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been [v-ing] [adv] [prep] several | 8 |
|
| 2 | [verb] [been] [v-ing] [adv] for several | 8 |
|
| 3 | have [been] [v-ing] [adv] [prep] several | 8 |
|
| 4 | [vb past] [been] [v-ing] [adv] [prep] several | 6 |
|
| 5 | had [been] [v-ing] [adv] [prep] several | 5 |
|
