Dic: will (some modal usages reviewed)

[1] MODAL: WHAT GENERALLY HAPPENS

   1.1 △You use will to indicate that an action usually happens in the particular way mentioned. [COBUILD]
   1.2 △used to say what always happens in a particular situation or what is generally true.[LDOCE]
   1.3 △used for stating what is generally true.[OALD]

• The thicker the material, the less susceptible the garment will be to wet conditions.
• There's no snake known that will habitually attack human beings unless threatened with its life.
• Oil will float on water.
• Accidents will happen.
• If it's made of wood it will float. [cf. 2.1 below]
• Engines won't run without lubricants.

[2] MODAL: WHAT IS PROBABLY TRUE

   2.1 △You use will in the main clause of some ‘if’ and ‘unless’ sentences to indicate something that you consider to be fairly likely to happen.[COBUILD]
   2.2 △used for stating what you think is probably true.[OALD]

• If you overcook the pancakes they will be difficult to roll.
• That'll be the doctor now.
• You'll have had dinner already, I suppose.

[3] MODAL: POSSIBILITY

   3.1 △You use will to say that a person or thing is able to do something in the future. [COBUILD]
   3.2 △used like 'can' to show what is possible.[LDOCE]
   3.3 △used for stating what is true or possible in a particular case. [OALD]

• How the country will defend itself in the future has become increasingly important...
• How will I recognize you?
• This car will hold five people comfortably.
• This jar will hold a pint.
• The door won't open!

.... COBUILD, LDOCE, OALD