| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [modal v] [be] [adj] year before | 33 |
|
| 2 | it [modal v] [be] [det] year before | 17 |
|
| 3 | it [modal v] [be] [num] year before | 16 |
|
| 4 | it [modal v] [be] many year before | 6 |
|
| 5 | it [modal v] [be] several year before | 6 |
|
| 6 | it [modal v] [be] many year before | 6 |
|
| 7 | it [modal v] [be] several year before | 6 |
|
| 8 | it [modal v] [be] some year before | 5 |
|
| 9 | it [modal v] [be] some year before | 5 |
|
| 10 | it [modal v] [be] year before [pron] | 10 |
|
| 11 | it [modal v] [be] year before [pers pn] | 9 |
|
