Attaching a paper contaning some transitional expressions which are helpful for showing the relationship between thoughts.moreover, these transitional words are appreciable for maintaining coherence not only in expansions but also in essays.Further, they are used to connect both sentences and paragraphs...For more go thorugh the piece of paper attached with this post ..
Regards
Muhammad Kamran Shaikh:

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Baroz-e-Hashar main be-khof ghuss jaonga Jannat mien,
Wahin se aye thay Adam woh meray baap Ka ghar hai
(Allam Iqbal)