| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | levels [prep] [noun] [noun] be [vb pp] | 10 |
|
| 2 | levels [prep] [noun] [noun] [be] [vb pp] | 10 |
|
| 3 | levels [prep] [noun] [noun] are [vb pp] | 8 |
|
| 4 | levels [prep] [noun] [noun] [am/are] [vb pp] | 8 |
|
| 5 | levels [prep] [noun] [noun] [vb pp] [prep] | 7 |
|
| 6 | levels [prep] [noun] [noun] [vb pp] [prep] | 7 |
|
