| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be called upon | 300 |
|
| 2 | be call upon | 117 |
|
| 3 | is call upon | 45 |
|
| 4 | was call upon | 40 |
|
| 5 | been call upon | 35 |
|
| 6 | are call upon | 25 |
|
| 7 | being call upon | 21 |
|
| 8 | were call upon | 18 |
|
| 9 | be calling upon | 6 |
|
