| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may [verb] for [det] | 72 |
|
| 2 | [modal v] account for [det] | 58 |
|
| 3 | may account for [adj] | 19 |
|
| 4 | may account [prep] [det] | 16 |
|
| 5 | may account [prep] [det] | 16 |
|
| 6 | may account for [det] | 15 |
|
