| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [verb] is [not/n't] | 30 |
|
| 2 | [adj] [to-vb] [is] [not/n't] | 25 |
|
| 3 | [adj] [verb] [is] n't | 24 |
|
| 4 | difficult [verb] [is] [not/n't] | 11 |
|
| 5 | [adj] [v-ing] [is] [not/n't] | 6 |
|
| 6 | [adj] [verb] [is] not | 6 |
|
