| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be useful [prep] [adj] | 79 |
|
| 2 | [be] useful for [adj] | 42 |
|
| 3 | be useful [prep] [adj] | 40 |
|
| 4 | [be] useful [prep] [adj] | 40 |
|
| 5 | [be] useful in [adj] | 32 |
|
| 6 | [is] useful [prep] [adj] | 18 |
|
| 7 | is useful [prep] [adj] | 17 |
|
| 8 | [am/are] useful [prep] [adj] | 15 |
|
| 9 | are useful [prep] [adj] | 15 |
|
| 10 | [be] useful [prep] other | 6 |
|
