Selection In MS Word With Mouse Keys:

Double click on any word is use to take a single word. Ctrl+click is use to state a single tense.
Tripple click on any sentence to select whole paragraph.
click on any left side of any line to select a whole line.
Double click on left side is use to select single paragraph.
Tripple click is use to select whole document.
Alt+right click is use to vertically or horizontal selection.