| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been used for | 195 |
|
| 2 | have be used for | 195 |
|
| 3 | [vb -s] be used for | 71 |
|
| 4 | has be used for | 62 |
|
| 5 | [vb base] be used for | 55 |
|
| 6 | have be used for | 53 |
|
| 7 | had be used for | 36 |
|
| 8 | [vb past] be used for | 36 |
|
| 9 | [vb infin] be used for | 24 |
|
| 10 | have be used for | 23 |
|
| 11 | [to-vb] be used for | 11 |
|
| 12 | to have be used for | 10 |
|
| 13 | 's be used for | 7 |
|
