SN4 ""

No	Pattern	Freq
1	[verb] to refer to	268
2	[verb] referred to	219
3	have refer to	216
4	[vb base] refer to	145
5	[vb pp] refer to	136
6	[vb past] refer to	88
7	[vb -s] refer to	80
8	use refer to	71
9	used refer to	70
10	[vb infin] refer to	69
11	have refer to	68
12	has refer to	47
13	had refer to	39
14	[verb] referring to	29
15	[v-ing] refer to	25
16	need refer to	17
17	stand refer to	17
18	have refer to	16
19	do refer to	16
20	stand refer to	16
21	've refer to	16
22	want refer to	16
23	[verb] refer to	16
24	having refer to	16
25	like refer to	14
26	want refer to	14
27	[verb] refers to	11
28	take refer to	10
29	seem refer to	10
30	need refer to	9