| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] | 200716 |
|
| 2 | is [vb pp] | 136581 |
|
| 3 | [be] used | 23236 |
|
| 4 | be used | 23235 |
|
| 5 | is use | 4057 |
|
| 6 | [is] used | 3386 |
|
