Hi Can anyone help me out to solve this problem
CONTROL-TAB to switch modes. When I discovered this, it was amazing. 
even after 2years it is still here 
This one is probably mentioned somewhere along the lines, but seeing as it’s extremely useful for me since using another laptop without numpad I figured others may find it helpful as well:
While rotating your 3D view, press and hold ALT to snap to orthographic views such as Top, Front, Left, Right, Bottom, Back, Bottom. Regardless of being in perspective mode or not. Now I also use it on my regular laptop for changing views.
I do miss my numpad though, I wish laptop manufacturers would stop with these ridiculous numpadless keyboard and small arrow keys nowadays.