| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] [adj] [adj] [noun pl] | 224 |
|
| 2 | is difficult [verb] [adj] [noun pl] | 54 |
|
| 3 | difficult [verb] [adj] [adj] [noun pl] | 36 |
|
| 4 | is difficult [verb] [adj] [noun pl] | 34 |
|
| 5 | is difficult [verb] [adj] [adj] | 30 |
|
