rewrite the sentences: they started writing to each other 4 months ago

-they have...............

*although she worked very hard,she did not get a good result

- despite................

*you should work harder 

-you ought not...............

*you should not stay up late

- you ought to.......................

rewrite the sentences: is this the biggest t-shirt you have?

- do you...............

rewrite the sentences: this is the firts time i have visited thailand

- i have.................