1.Let me have a try.祈使句.祈使句的特点是省略了主语you.
本句话的句子成分为(主谓宾)：
谓语：let
宾语：me
宾补：have a try
2.we stopped there for a swim
主语：we
谓语：stop
状语：地点状语 there； 原因状语 for a swim
3.can i have a read of your paper 一般疑问句
主语：I
复合谓语：can have
宾语：a read of your paper.
4.she had a cry about the sad new
主语：She
谓语：had
宾语：a cry
状语：原因状语 about the sad new
5.we went for a stroll
主语：We
谓语：went
状语：目的状语 for a stroll
6.you could make a guess at it
主语：you
复合谓语：could make
宾语：a guess
状语：地点状语 at it
Wish you happy tonight~