In the English Grammar Profile, B2 point 59 in the category of PAST is defined:
past perfect simple AFTER ‘BECAUSE’ giving explanatory information.
Here are examples of past perfect simple used to give explanations.
Someone even wiped away tears because she had done it,
she had connected them to information differently, she helped them see something they couldn’t unsee.
Vicky called because her husband had suddenly collapsed in the hallway of their home.
A search in iWeb for
because _P had _VVN
1 BECAUSE I HAD HEARD 519
2 BECAUSE I HAD SEEN 376
3 BECAUSE I HAD READ 372
4 BECAUSE IT HAD BECOME 282
5 BECAUSE HE HAD SEEN 222
6 BECAUSE HE HAD LOST 201
7 BECAUSE HE HAD HEARD 200
8 BECAUSE HE HAD MADE 199
9 BECAUSE I HAD MADE 193
10 BECAUSE I HAD LOST 173
11 BECAUSE THEY HAD SEEN 170
12 BECAUSE I HAD GOTTEN 169
13 BECAUSE HE HAD TAKEN 168
14 BECAUSE I HAD FORGOTTEN 160
15 BECAUSE I HAD TAKEN 159
16 BECAUSE I HAD SPENT 151
17 BECAUSE HE HAD BECOME 148
18 BECAUSE I HAD USED 148
19 BECAUSE THEY HAD BECOME 144
20 BECAUSE THEY HAD HEARD 129
21 BECAUSE I HAD TRIED 127
22 BECAUSE I HAD GONE 126
23 BECAUSE HE HAD GIVEN 123
24 BECAUSE I HAD WORKED 122
25 BECAUSE I HAD BECOME 114
26 BECAUSE HE HAD WORKED 111
27 BECAUSE THEY HAD LOST 110
28 BECAUSE HE HAD FAILED 105
29 BECAUSE I HAD BOUGHT 101
30 BECAUSE I HAD PUT 98
31 BECAUSE HE HAD GONE 95
32 BECAUSE HE HAD RECEIVED 95
33 BECAUSE SHE HAD SEEN 95
34 BECAUSE SHE HAD HEARD 94
35 BECAUSE THEY HAD MADE 94
36 BECAUSE I HAD FOUND 91
37 BECAUSE HE HAD TOLD 90
38 BECAUSE I HAD LEFT 90
39 BECAUSE SHE HAD LOST 89
40 BECAUSE THEY HAD FAILED 89
41 BECAUSE I HAD LEARNED 87
42 BECAUSE HE HAD COME 86
43 BECAUSE HE HAD SPENT 86
44 BECAUSE HE HAD LEARNED 84
45 BECAUSE HE HAD SAID 84
46 BECAUSE HE HAD FOUND 83
47 BECAUSE THEY HAD FOUND 83
48 BECAUSE THEY HAD TAKEN 82
49 BECAUSE I HAD COME 79
50 BECAUSE I HAD STARTED 79
51 BECAUSE HE HAD LEFT 78
BECAUSE I HAD PLANNED
Metro53 BECAUSE I HAD RUN 76
54 BECAUSE I HAD WRITTEN 76
55 BECAUSE I HAD THOUGHT 75
56 BECAUSE I HAD GIVEN 73
57 BECAUSE THEY HAD COME 73
58 BECAUSE SHE HAD MADE 72
59 BECAUSE HE HAD GOTTEN 71
60 BECAUSE SHE HAD BECOME 71
61 BECAUSE WE HAD HEARD 70
62 BECAUSE I HAD SET 69
63 BECAUSE IT HAD TAKEN 69
64 BECAUSE HE HAD PROMISED 68
65 BECAUSE THEY HAD RECEIVED 67
66 BECAUSE HE HAD REFUSED 66
67 BECAUSE HE HAD USED 66
68 BECAUSE HE HAD KILLED 65
69 BECAUSE IT HAD FAILED 65
70 BECAUSE I HAD GROWN 64
71 BECAUSE I HAD SAID 64
72 BECAUSE THEY HAD RUN 62
73 BECAUSE HE HAD FALLEN 59
74 BECAUSE HE HAD LIVED 59
75 BECAUSE THEY HAD GONE 59
76 BECAUSE HE HAD WRITTEN 58
77 BECAUSE SHE HAD GIVEN 58
78 BECAUSE SHE HAD TAKEN 57
79 BECAUSE I HAD TOLD 56
80 BECAUSE THEY HAD LEFT 56
81 BECAUSE I HAD DECIDED 55
82 BECAUSE I HAD PURCHASED 55
83 BECAUSE IT HAD GOTTEN 55
84 BECAUSE THEY HAD REFUSED 55
85 BECAUSE HE HAD TRIED 54
86 BECAUSE SHE HAD SPENT 54
87 BECAUSE THEY HAD GIVEN 53
88 BECAUSE I HAD HOPED 52
89 BECAUSE WE HAD MADE 52
90 BECAUSE HE HAD READ 51
91 BECAUSE HE HAD BROKEN 50
92 BECAUSE I HAD PLAYED 48
93 BECAUSE HE HAD COMMITTED 47
94 BECAUSE I HAD ASKED 47
95 BECAUSE I HAD DEVELOPED 47
96 BECAUSE I HAD MOVED 47
97 BECAUSE I HAD PAID 47
98 BECAUSE SHE HAD FOUND 47
99 BECAUSE IT HAD COME 46
100 BECAUSE SHE HAD TOLD 46
B1 vocabulary: developed, planned, promised, refused
1 BECAUSE OF WHAT HAD HAPPENED 114
2 BECAUSE IF I HAD KNOWN 20
3 BECAUSE THE LORD HAD SAID 17
4 BECAUSE THE SUN HAD SET 16
5 BECAUSE NO ONE HAD TOLD 15
6 BECAUSE THE TIME HAD COME 15
7 BECAUSE HIS FATHER HAD DIED 14
8 BECAUSE NO ONE HAD SEEN 13
9 BECAUSE THE CANCER HAD SPREAD 13
10 BECAUSE HER MOTHER HAD DIED 12
1 BECAUSE OF WHAT I HAD READ 19
2 BECAUSE TOBIAH AND SANBALLAT HAD HIRED 14
3 BECAUSE TOO MUCH TIME HAD PASSED 13
4 BECAUSE SO MUCH TIME HAD PASSED 12
5 BECAUSE THEY KNEW HE HAD SPOKEN 12