| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [been] [v-ing] [prep] [det] years | 20 |
|
| 2 | [vb past] been [v-ing] [prep] [det] year | 20 |
|
| 3 | [vb past] [been] [v-ing] for [det] year | 20 |
|
| 4 | had [been] [v-ing] [prep] [det] year | 19 |
|
| 5 | [vb past] [been] [v-ing] [prep] many year | 7 |
|
| 6 | [vb past] [been] [v-ing] [prep] some year | 7 |
|
| 7 | [vb past] [been] [v-ing] [prep] several year | 6 |
|
