| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [prep] the usa | 21 |
|
| 2 | [be] in the usa | 14 |
|
| 3 | [is] [prep] the usa | 8 |
|
| 4 | [was/were] [prep] the usa | 6 |
|
| 5 | is [prep] the usa | 6 |
|
| 6 | was [prep] the usa | 5 |
|
