| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] for [det] [noun] | 254 |
|
| 2 | is [vb pp] for [det] [noun] | 199 |
|
| 3 | is required [prep] [det] [noun] | 45 |
|
| 4 | is required for [adj] [noun] | 42 |
|
| 5 | [be] required for [det] [noun] | 41 |
|
| 6 | be required for [det] [noun] | 41 |
|
| 7 | is require for [det] [noun] | 19 |
|
| 8 | [is] required for [det] [noun] | 19 |
|
