| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult because [art] | 15 |
|
| 2 | [adv] difficult because [art] | 14 |
|
| 3 | [be] difficult because [art] | 8 |
|
| 4 | be difficult because [art] | 8 |
|
| 5 | difficult [to-vb] because [art] | 8 |
|
| 6 | difficult [verb] because [art] | 8 |
|
| 7 | difficult because [prep] [art] | 26 |
|
| 8 | difficult because [prep] [art] | 26 |
|
| 9 | difficult because of [art] | 24 |
|
| 10 | difficult because of [art] | 24 |
|
| 11 | difficult because [art] [noun] | 17 |
|
| 12 | difficult because [art] [noun sg] | 13 |
|
| 13 | difficult because [art] [adj] | 7 |
|
| 14 | difficult because [art] [adj] | 7 |
|
