高悬赏求5句英语的语言点,语法1.LastmonthIwasluckyenoughtohaveachancetomakeatripintospacewithmyfriendLiYanping,anastronomer.2.Beforeweleft,LiYanpingexplainedtomethattheforceofgravitywouldchangethreetimes

Question

高悬赏求5句英语的语言点,语法
1.Last month I was lucky enough to have a chance to make a trip into space with my friend Li Yanping,an astronomer.
2.Before we left,Li Yanping explained to me that the force of gravity would change three times on our journey and that the first change would be the most powerful.
3.I cheered up immediately and floated weightlessly around in our spaceship cabin watching the earth become smaller and the moon larger.
4."Oh dear," I cried,"walking does need a bit of practice now that gravity has changed."
5.We watched,amazed as fire broke out on the outside of the spaceship as the earth's gravity increased.求这五句话的语言点,语法,是什么从句等等.
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Answer 1

1 同位语liyangping和astronomer
2宾语从句 省掉宾语2 用that从句引导
3伴随状语 现在分词表状语
4原因状语从句（不是很确定）that 后面表示原因
5as引导的原因状语从句