| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] account for a [adj] [noun] | 12 |
|
| 2 | [modal v] account for a [adj] [noun] | 12 |
|
| 3 | [modal v] account for a [adj] [noun] | 11 |
|
| 4 | [modal v] account for a [adj] [noun sg] | 11 |
|
| 5 | may account for a [adj] [noun] | 7 |
|
| 6 | may account for a [adj] [noun] | 7 |
|
