SN4 ""

No	Pattern	Freq
1	[Wh det] had [vb pp]	5474
2	which had [verb]	4043
3	what had [verb]	1447
4	[Wh det] had happen	1005
5	[Wh det] had happened	1001
6	[Wh det] had become	155
7	[Wh det] had become	155
8	[Wh det] had take	134
9	[Wh det] had taken	132
10	[Wh det] had begin	130
11	[Wh det] had begun	129
12	[Wh det] had go	114
13	[Wh det] had gone	113
14	[Wh det] had come	104
15	[Wh det] had led	103
16	[Wh det] had lead	103
17	[Wh det] had come	102
18	[Wh det] had make	92
19	[Wh det] had made	90
20	[Wh det] had cause	87
21	[Wh det] had caused	87
22	[Wh det] had brought	77
23	[Wh det] had bring	77
24	[Wh det] had occurred	59
25	[Wh det] had occur	59
26	[Wh det] had seem	53
27	[Wh det] had seemed	53
28	[Wh det] had give	52
29	[Wh det] had started	51
30	[Wh det] had given	51