| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [not/n't] [prep] a [noun sg] | 1292 |
|
| 2 | [am/are] [prep] a [noun sg] | 1241 |
|
| 3 | [am/are] [not/n't] a [noun sg] | 818 |
|
| 4 | [am/are] [not/n't] [prep] [noun sg] | 440 |
|
| 5 | [am/are] [not/n't] [prep] a | 173 |
|
