| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it 's always [adj] to know | 8 |
|
| 2 | it 's very [adj] to know | 7 |
|
| 3 | it 's [adv] difficult to know | 6 |
|
| 4 | it 's [adv] nice to know | 6 |
|
| 5 | it 's [adv] important to know | 5 |
|
