| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] for [adj] years | 151 |
|
| 2 | [be] [verb] for several years | 30 |
|
| 3 | [be] [v-ing] for several [noun] | 27 |
|
| 4 | [be] [v-ing] for several [noun pl] | 27 |
|
| 5 | [be] [v-ing] [prep] several years | 15 |
|
| 6 | [be] [v-ing] [prep] several years | 15 |
|
| 7 | [be] [v-ing] for several year | 14 |
|
| 8 | [be] [v-ing] for several years | 14 |
|
