SN4 ""

No	Pattern	Freq
1	[verb] [vb pp] the problem	154
2	have [vb pp] the problem	153
3	[adv] [vb pp] the problem	70
4	[adv] [vb pp] the problem	58
5	[vb base] [vb pp] the problem	56
6	have [vb pp] the problem	48
7	[vb -s] [vb pp] the problem	36
8	has [vb pp] the problem	35
9	[vb past] [vb pp] the problem	29
10	had [vb pp] the problem	27
11	[noun] [vb pp] the problem	16
12	[not/n't] [vb pp] the problem	12
13	not [vb pp] the problem	12
14	have [vb pp] the problem	12
15	[vb infin] [vb pp] the problem	12
16	[to-vb] [vb pp] the problem	11
17	be [vb pp] the problem	11
18	[be] [vb pp] the problem	11
19	to have [vb pp] the problem	11
20	[noun sg] [vb pp] the problem	9
21	[v-ing] [vb pp] the problem	9
22	having [vb pp] the problem	9
23	've [vb pp] the problem	8
24	[noun pl] [vb pp] the problem	7
25	n't [vb pp] the problem	7
26	also [vb pp] the problem	6
27	also [vb pp] the problem	6
28	[conj] [vb pp] the problem	6
29	be [vb pp] the problem	5
30	not [vb pp] the problem	5