请问这两个句子的的主语,谓语,宾语?

1） Often it is the delivery which causes the audience to smile ,so speak slowly and remember that a raised eyebrow or an unbelieving look may help to show that you are making a light-hearted remark.
这是一个强调句型.
It is + 被强调部分 + which (that,who,whom) 表示：正是,就是.
例如：
It is him whom they are talking about.
他们在谈到的正是他.
实际这句话应这样：
They are talking about him.
第一句应是这样：
The delivery causes the audience to smile
所以：主语是 The delivery
谓语是 causes
宾语是 the audience to smile
为强调主语The delivery,所以用了It is + 被强调部分 + which 句型.
其后的部分是进一步说明整个句子的,做状语.
其实这是一句从句,但省略了泛指的主语“你”而只有谓语speak slowly and remember
remember后带有自己的宾语从句a raised eyebrow or an unbelieving look may help to show that you are making a light-hearted remark.
另外,宾语从句中的谓语show 还带有自己的从句.
此句比较复杂,从句套从句.
2）A twist on a familiar quote "If at first you don’t succeed, give up" or a play on words or on situation.
这不是一个句子,只是一个短语 .没有主语,谓语,宾语.短语中有一个引语.
如果你想搞明白引语的意思,只分析引语就行.而这里引语也只是断章取意,只有一个if 从句,不是整个句子.