I'd only use in across the board, but others may differ in their opinions.
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"I instructed/coached them in/on driving an auto,"
"I instructed/coached them in/on how to drive an auto," and
"I instructed/coached them to drive an auto".
AnonymousIn these cases?--[1] "I instructed/coached them in/on driving an auto,"
[2] "I instructed/coached them in/on how to drive an auto," and
[3] "I instructed/coached them to drive an auto".
The first is advice, the second is instruction, and the third is an emergency effort. On the other hand, they could, and probably do, have th