| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may [verb] for a [adj] [noun] | 36 |
|
| 2 | may account for [art] [adj] [noun] | 20 |
|
| 3 | [modal v] account for a [adj] [noun] | 13 |
|
| 4 | may account for a [adj] [noun] | 7 |
|
| 5 | may account [prep] a [adj] [noun] | 7 |
|
