| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to be concerned | 80 |
|
| 2 | [vb pp] to be concerned | 26 |
|
| 3 | [vb -s] to be concerned | 18 |
|
| 4 | [vb base] to be concerned | 12 |
|
| 5 | [vb infin] to be concerned | 11 |
|
| 6 | have to be concerned | 10 |
|
| 7 | say to be concerned | 10 |
|
| 8 | said to be concerned | 9 |
|
| 9 | [vb past] to be concerned | 8 |
|
| 10 | appear to be concerned | 8 |
|
| 11 | claim to be concerned | 7 |
|
| 12 | seem to be concerned | 5 |
|
| 13 | continue to be concerned | 5 |
|
| 14 | seems to be concerned | 5 |
|
| 15 | [v-ing] to be concerned | 5 |
|
