| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] is [prep] [adv] [vb infin] | 8 |
|
| 2 | to do is [prep] [adv] [vb infin] | 8 |
|
| 3 | [to-vb] is to [adv] [vb infin] | 8 |
|
