| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] been [v-ing] for [adj] years | 30 |
|
| 2 | have been [v-ing] [prep] [adj] years | 21 |
|
| 3 | [vb base] been [v-ing] [prep] [num] years | 21 |
|
| 4 | 've been [v-ing] [prep] [adj] years | 12 |
|
| 5 | [vb base] been [v-ing] [prep] [det] years | 9 |
|
| 6 | [vb base] been [v-ing] [prep] several years | 6 |
|
| 7 | [vb base] been [v-ing] [prep] several years | 6 |
|
| 8 | [vb base] been going [prep] [adj] years | 5 |
|
