| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] [vb pp] [adv] [to-vb] | 20 |
|
| 2 | is [not/n't] [vb pp] [adv] [to-vb] | 12 |
|
| 3 | is not [vb pp] [adv] [to-vb] | 12 |
|
| 4 | is not [vb pp] [adv] [to-vb] | 12 |
|
| 5 | is [adv] used [adv] [to-vb] | 5 |
|
