| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] for [det] years | 37 |
|
| 2 | been [v-ing] for [det] years | 37 |
|
| 3 | [been] [v-ing] for [det] years | 37 |
|
| 4 | [be] [v-ing] for many years | 14 |
|
| 5 | [be] [v-ing] for several years | 14 |
|
| 6 | [be] [v-ing] for some years | 9 |
|
