| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] required for [art] [adj] [noun sg] | 18 |
|
| 2 | is require for [art] [adj] [noun sg] | 18 |
|
| 3 | [is] require for the [adj] [noun sg] | 9 |
|
| 4 | [is] require for a [adj] [noun sg] | 6 |
|
