| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should be [vb pp] on | 55 |
|
| 2 | should be [v-ing] on | 13 |
|
| 3 | should be take on | 8 |
|
| 4 | should be taken on | 8 |
|
| 5 | should be passed on | 7 |
|
| 6 | should be pass on | 7 |
|
| 7 | should be concentrating on | 6 |
|
| 8 | should be carried on | 6 |
|
| 9 | should be carry on | 6 |
|
| 10 | should be concentrate on | 6 |
|
| 11 | should be hang on | 5 |
|
| 12 | should be kept on | 5 |
|
| 13 | should be hung on | 5 |
|
| 14 | should be keep on | 5 |
|
