| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but [pers pn] be [adv] difficult [verb] | 61 |
|
| 2 | but [pers pn] [be] [adv] difficult [to-vb] | 61 |
|
| 3 | but it [be] [adv] difficult [verb] | 51 |
|
| 4 | but [pers pn] [is] [adv] difficult [verb] | 40 |
|
| 5 | but [pers pn] is [adv] difficult [verb] | 27 |
|
| 6 | but [pers pn] [be] very difficult [verb] | 22 |
|
| 7 | but [pers pn] [was/were] [adv] difficult [verb] | 15 |
|
| 8 | but [pers pn] 's [adv] difficult [verb] | 13 |
|
| 9 | but [pers pn] was [adv] difficult [verb] | 11 |
|
| 10 | but they [be] [adv] difficult [verb] | 10 |
|
| 11 | but [pers pn] [be] often difficult [verb] | 7 |
|
| 12 | but [pers pn] [am/are] [adv] difficult [verb] | 6 |
|
| 13 | but [pers pn] are [adv] difficult [verb] | 6 |
|
