it was hard to do与it was hard doing的区别

it was hard to do与it was hard doing的区别 she was hard to leave.是it was hard to leave her的变形,但为什么? it was raining really hard it was hardly hard work It was raining hard 是什么意思 think it hard to do 和 i think it's hard to do 有什么区别 it found it was hard to finish the hard work on time Although it was raining hard,Bill still___ How___(hard) it was snowing yesterday It was hard time on us. It was raining hard all day 修改It was rained very hard.