SN4 ""

No	Pattern	Freq
1	[noun] [be] a major problem	30
2	[noun sg] [be] a major problem	22
3	[pron] [be] a major problem	12
4	[adj] [be] a major problem	11
5	[det] [be] a major problem	10
6	this [be] a major problem	8
7	[pers pn] [be] a major problem	8
8	it [be] a major problem	8
9	[modal v] [be] a major problem	8
10	it [be] a major problem	8
11	[vb mod] [be] a major problem	8
12	this [be] a major problem	8
13	[noun pl] [be] a major problem	7
14	to [be] a major problem	6
15	[prep] [be] a major problem	6
16	to [be] a major problem	6
17	[prep] [be] a major problem	6
18	[verb] [be] a major problem	5
19	have [be] a major problem	5
20	[be] [adv] a major problem	24
21	[be] [adv] a major problem	12
22	[be] not a major problem	12
23	[be] [not/n't] a major problem	12
24	[be] not a major problem	10
25	[be] still a major problem	6
26	[be] still a major problem	6
27	[be] a major [adj] problem	6
28	[be] a major [adj] problem	6
29	[be] a major problem [prep]	34
30	[be] a major problem [prep]	34