SN4 ""

No	Pattern	Freq
1	[noun sg] is [adv] [subord]	336
2	[noun] is [adv] than	189
3	[noun] is less [subord]	111
4	[noun] is [adv] as	92
5	[noun] is more [subord]	74
6	[noun pl] is [adv] [subord]	37
7	[noun prp] is [adv] [subord]	30
8	[noun] is [adv] because	26
9	[noun] is [adv] considering	22
10	[noun] is all [subord]	21
11	[noun] is there [subord]	21
12	[noun] is [adv] but	20
13	[noun] is [adv] if	20
14	[noun] is just [subord]	20
15	[noun] is [adv] when	17
16	[noun] is now [subord]	16
17	[noun] is [adv] whether	11
18	[noun] is best [subord]	9
19	[noun] is also [subord]	8
20	[noun] is still [subord]	7
21	[noun] is probably [subord]	7
22	system is [adv] [subord]	7
23	system is [adv] [subord]	7
24	[noun] is exactly [subord]	6
25	question is [adv] [subord]	5
26	[letter] is [adv] [subord]	5
27	time is [adv] [subord]	5
28	life is [adv] [subord]	5
29	[noun] is rather [subord]	5
30	[noun] is though [subord]	5