| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] have been [vb pp] [adv prt] [prep] | 417 |
|
| 2 | [noun pl] have been [vb pp] [adv prt] [prep] | 307 |
|
| 3 | studies [verb] been [vb pp] [adv prt] [prep] | 13 |
|
| 4 | studies have been [vb pp] [adv prt] [prep] | 13 |
|
| 5 | studies have [been] [vb pp] [adv prt] [prep] | 12 |
|
| 6 | studies have been [vb pp] [adv] [prep] | 12 |
|
| 7 | study have been [vb pp] [adv prt] [prep] | 12 |
|
| 8 | studies have been [verb] [adv prt] [prep] | 12 |
|
| 9 | studies have [be] [vb pp] [adv prt] [prep] | 12 |
|
| 10 | studies [vb base] been [vb pp] [adv prt] [prep] | 12 |
|
| 11 | studies have be [vb pp] [adv prt] [prep] | 12 |
|
