| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is necessary [verb] such statements | 5 |
|
| 2 | is necessary [verb] such statements | 5 |
|
| 3 | is [adj] understand such statements | 5 |
|
| 4 | is [adj] [verb] such statements | 5 |
|
| 5 | is [adj] to understand such statements | 5 |
|
| 6 | is [adj] [to-vb] such statements | 5 |
|
| 7 | is [adj] [verb] such statements | 5 |
|
