| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [vb past] [be] [v-ing] for several | 5 |
|
| 2 | [pron] [vb past] [be] [v-ing] for several | 5 |
|
| 3 | [vb past] [be] [v-ing] [adv] for several | 7 |
|
| 4 | [vb past] [be] [v-ing] [adv] for several | 6 |
|
| 5 | [vb past] [be] [v-ing] for several [noun pl] | 11 |
|
| 6 | [vb past] [be] [v-ing] for several [noun] | 11 |
|
| 7 | [vb past] [be] [v-ing] for several years | 6 |
|
| 8 | [vb past] [be] [v-ing] for several year | 6 |
|
