| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [not/n't] have [been] [prep] [art] | 41 |
|
| 2 | may [adv] have [been] [prep] [art] | 12 |
|
| 3 | may [not/n't] have [been] [prep] [art] | 6 |
|
| 4 | may [not/n't] [verb] [been] [prep] [art] | 6 |
|
| 5 | may [not/n't] [vb infin] [been] [prep] [art] | 6 |
|
| 6 | may [not/n't] have [been] [prep] [art] | 6 |
|
| 7 | may [not/n't] have [been] [prep] [art] | 6 |
|
| 8 | may [not/n't] have [be] [prep] [art] | 6 |
|
