Here are all the controls for Monster Hunter: World on PC, enjoy.
Move Forward – W
Move Left – S
Move Back – A
Move Right – D
Focus Camera / Select Target – F
Wildlife Map – M
Display Chat – Insert
Hide Chat – Insert or Esc
Open Start Menu – Esc
Display Items (Hold) / Reset Camera – Q
Browse Items Left – Left
Browse Items Right – Right
Browse Coatings Up/Down – Mouse Wheel
Browse Ammo/Coatings Up – Up
Browse Ammo/Coatings Down – Down
Fire/Shoot – Left Mouse
Normal Attack (Weapon Drawn) – Left Mouse
Use Item / Sheathe Weapon – E
Dash / Sheathe Weapon – B
Dash (Hold) / Sheathe Weapon – Shift
Interact / Speak / Gather / Carve / Special Attack – Right Mouse
Crouch / Dodge – Space
Display Slinger Aiming Reticle – C
Display Slinger Aiming Reticle (Hold) – V
Use Slinger – Left Mouse
Draw Weapon / Guard / Unique Weapon Action – Ctrl
Reload (Bow) / Apply Coating / Remove Coating – R