SN4 ""

No	Pattern	Freq
1	is [adj] [to-vb] that	1987
2	is important [verb] that	484
3	is [adj] note that	311
4	is [adj] to note that	310
5	is [adj] say that	226
6	is [adj] to say that	226
7	is interesting [verb] that	183
8	is [adj] remember that	131
9	is [adj] to remember that	131
10	is [adj] to believe that	117
11	is [adj] believe that	117
12	is [adj] assume that	115
13	is [adj] to assume that	114
14	is reasonable [verb] that	103
15	is easy [verb] that	103
16	is difficult [verb] that	97
17	is fair [verb] that	89
18	is [adj] ensure that	86
19	is [adj] to ensure that	85
20	is [adj] to see that	83
21	is [adj] see that	83
22	is hard [verb] that	78
23	is possible [verb] that	73
24	is [adj] to realise that	52
25	is [adj] realise that	52
26	is necessary [verb] that	51
27	is [adj] know that	48
28	is [adj] to know that	47
29	is [adj] imagine that	44
30	is [adj] to imagine that	44