| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [verb] [prep] | 91309 |
|
| 2 | [is] [vb pp] [prep] | 72858 |
|
| 3 | [be] based [prep] | 5738 |
|
| 4 | [is] base [prep] | 2308 |
|
