| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | are used [prep] a | 73 |
|
| 2 | [am/are] used as a | 29 |
|
| 3 | [am/are] used in a | 15 |
|
| 4 | [am/are] used for a | 11 |
|
| 5 | [am/are] used by a | 8 |
|
