| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] [adj] [to-vb] [Wh det] | 67 |
|
| 2 | it is [adv] [adj] [verb] [Wh det] | 67 |
|
| 3 | it is [adv] [adj] [verb] [Wh det] | 65 |
|
| 4 | it is [adv] [adj] [verb] what | 55 |
|
| 5 | it is [adv] difficult [verb] [Wh det] | 18 |
|
| 6 | it is [adv] difficult [verb] [Wh det] | 18 |
|
| 7 | it is [adv] [adj] [verb] which | 12 |
|
| 8 | it is [adv] [adj] to say [Wh det] | 9 |
|
| 9 | it is [adv] [adj] say [Wh det] | 9 |
|
| 10 | it is also [adj] [verb] [Wh det] | 9 |
|
| 11 | it is very [adj] [verb] [Wh det] | 8 |
|
| 12 | it is [adv] important [verb] [Wh det] | 7 |
|
| 13 | it is [adv] important [verb] [Wh det] | 7 |
|
| 14 | it is therefore [adj] [verb] [Wh det] | 6 |
|
| 15 | it is [adv] [adj] to know [Wh det] | 6 |
|
| 16 | it is [adv] [adj] know [Wh det] | 6 |
|
| 17 | it is often [adj] [verb] [Wh det] | 5 |
|
| 18 | it is [adv] [adj] to consider [Wh det] | 5 |
|
| 19 | it is [adv] [adj] consider [Wh det] | 5 |
|
| 20 | it is [adv] easy [verb] [Wh det] | 5 |
|
