| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adj] [to-vb] [prep] [art] [noun] | 700 |
|
| 2 | is [adj] [to-vb] [prep] [art] [noun] | 650 |
|
| 3 | be necessary [to-vb] [prep] [art] [noun] | 82 |
|
| 4 | [be] necessary [to-vb] [prep] [art] [noun] | 82 |
|
| 5 | is necessary [verb] [prep] [art] [noun] | 35 |
|
| 6 | is necessary [to-vb] [prep] [art] [noun] | 35 |
|
| 7 | is necessary [to-vb] [prep] [art] [noun] | 35 |
|
| 8 | [is] necessary [to-vb] [prep] [art] [noun] | 35 |
|
