SN4 ""

No	Pattern	Freq
1	is [adj] for [pers pn]	640
2	is [adj] for [pers pn]	551
3	is [verb] for [pers pn]	160
4	is [adv] for [pers pn]	134
5	is good for [pers pn]	119
6	is not for [pers pn]	84
7	is [not/n't] for [pers pn]	84
8	is [vb pp] for [pers pn]	80
9	is good for [pers pn]	75
10	is [v-ing] for [pers pn]	74
11	is not for [pers pn]	73
12	is difficult for [pers pn]	55
13	is difficult for [pers pn]	55
14	is [adv] for [pers pn]	47
15	is important for [pers pn]	44
16	is important for [pers pn]	44
17	is [pron] for [pers pn]	41
18	is [adj -er] for [pers pn]	36
19	is [adj -est] for [pers pn]	36
20	is best for [pers pn]	33
21	is impossible for [pers pn]	33
22	is [noun] for [pers pn]	33
23	is impossible for [pers pn]	33
24	is right for [pers pn]	32
25	is right for [pers pn]	32
26	is wait for [pers pn]	30
27	is [noun sg] for [pers pn]	30
28	is easy for [pers pn]	29
29	is necessary for [pers pn]	28
30	is necessary for [pers pn]	28