| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] it [is] [adv] difficult | 47 |
|
| 2 | [verb] it 's [adv] difficult | 30 |
|
| 3 | [verb] it [is] very difficult | 23 |
|
| 4 | [vb base] it [is] [adv] difficult | 23 |
|
| 5 | [verb] it is [adv] difficult | 17 |
|
| 6 | think it [is] [adv] difficult | 10 |
|
| 7 | think it [is] [adv] difficult | 10 |
|
| 8 | know it [is] [adv] difficult | 7 |
|
| 9 | know it [is] [adv] difficult | 6 |
|
| 10 | [vb -s] it [is] [adv] difficult | 6 |
|
| 11 | [verb] it [is] more difficult | 6 |
|
| 12 | say it [is] [adv] difficult | 5 |
|
| 13 | [vb pp] it [is] [adv] difficult | 5 |
|
