| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be used for the | 150 |
|
| 2 | is used for the | 59 |
|
| 3 | was used for the | 59 |
|
| 4 | were used for the | 29 |
|
| 5 | been used for the | 29 |
|
| 6 | being used for the | 24 |
|
| 7 | are used for the | 24 |
|
