| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should be [adj] [noun] | 501 |
|
| 2 | should be [adj] [noun] | 264 |
|
| 3 | [modal v] be compulsory [noun] | 10 |
|
| 4 | [vb mod] be compulsory [noun] | 10 |
|
| 5 | should be compulsory [noun] | 5 |
|
| 6 | should [be] compulsory [noun] | 5 |
|
| 7 | should be compulsory [noun] | 5 |
|
