| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should be [verb] [prep] [art] [adj] | 1047 |
|
| 2 | should be [vb pp] [prep] [art] [adj] | 1029 |
|
| 3 | [modal v] be used [prep] [art] [adj] | 228 |
|
| 4 | should be used [prep] [art] [adj] | 20 |
|
| 5 | should be use [prep] [art] [adj] | 15 |
|
| 6 | should be used [prep] [art] [adj] | 15 |
|
| 7 | should [be] used [prep] [art] [adj] | 15 |
|
