1.   The collapse of a mine could cause an earthquake, he said, but had that happened, the seismogram probably would have shown the tremors coming on gradually.

2.   What happened in Forsyth has no less to teach us.

3.   What happened next still has Democrats seething.

4.   What happened in Reconstruction has relevance.

5.   Had that happened, one must wonder who would have ever given the order that the embalmed body be cremated.

v. + happen >>共 95
look 19.19%
be 13.66%
wonder 7.85%
know 5.23%
say 4.94%
see 4.36%
study 4.07%
think 2.91%
examine 1.74%
explain 1.45%
have 1.45%
have + v. >>共 557
say 7.39%
have 7.16%
do 4.33%
come 4.33%
unite 2.37%
be 2.19%
make 2.02%
go 1.50%
get 1.50%
run 1.21%
happen 0.29%
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