描图

a.对话

As is described in the picture,A tells/aks B that...

Instead of a direct answer,B responds that...

b.独白

As is described in the picture+描述情境

She thinks/says/asks that...(间接引语)

       is asked that...  whether

c.无对话/独白

转述背景+自己描述

揭示主题

Actually,recent years have witnessed an increasing trend of/discussion on...在题目中寻找

理由1：First/First of all/To begin with...

理由2：Second/Moreover/In addition...

For example,...,is a case in point.

结尾段

让步/总结

However,we can never deny the fact...

In summary,...

重申主题/未来做法(个人政府she'h)

Therefore,...