| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be a source [prep] [noun] | 39 |
|
| 2 | [vb mod] be a source [prep] [noun] | 39 |
|
| 3 | [prep] be a source [prep] [noun] | 14 |
|
| 4 | can be a source [prep] [noun] | 14 |
|
| 5 | to be a source [prep] [noun] | 14 |
|
| 6 | [prep] be a source [prep] [noun] | 14 |
|
| 7 | to be a source [prep] [noun] | 14 |
|
| 8 | can be a source [prep] [noun] | 14 |
|
| 9 | may be a source [prep] [noun] | 9 |
|
| 10 | may be a source [prep] [noun] | 9 |
|
| 11 | could be a source [prep] [noun] | 6 |
|
| 12 | [adv] be a source [prep] [noun] | 6 |
|
| 13 | should be a source [prep] [noun] | 6 |
|
| 14 | could be a source [prep] [noun] | 6 |
|
| 15 | should be a source [prep] [noun] | 6 |
|
| 16 | [adv] be a source [prep] [noun] | 5 |
|
| 17 | be a [adj] source [prep] [noun] | 62 |
|
| 18 | be a [adj] source [prep] [noun] | 61 |
|
| 19 | be a important source [prep] [noun] | 9 |
|
| 20 | be a important source [prep] [noun] | 9 |
|
| 21 | be a useful source [prep] [noun] | 7 |
|
| 22 | be a major source [prep] [noun] | 7 |
|
| 23 | be a useful source [prep] [noun] | 7 |
|
| 24 | be a major source [prep] [noun] | 7 |
|
| 25 | be a great source [prep] [noun] | 5 |
|
| 26 | be a source [prep] [adj] [noun] | 28 |
|
| 27 | be a source [prep] [adj] [noun] | 24 |
|
| 28 | be a source [prep] [noun] [prep] | 18 |
|
| 29 | be a source [prep] [noun] [prep] | 18 |
|
| 30 | be a source [prep] [noun] [conj] | 14 |
|
