Question

They set out though it was raining heavily.

Using a complex prepositions:
答案是they set out in spite of the heavy rain
我写的Even though it was raining heavily they set out，对吗？

Answer 1

题主所写的不对圆物，因为并没棚慧有使用复合介橘和液词。正确的句子可以是：

They set out despite of the heavy rain.

Answer 2

对也对，但是even though it rwas raining heavily 作为开头，the,set out作为后面，显卜镇得头重脚轻，有没有觉得备弊歼仿冲？！

Answer 3

they stilll insist to set at outside.