Will

We use will  when we talk about WILLINGNESS to do something  and will not (or won't) when we talk about UNWILLINGNESS to do
something
• I'll give you another chance to get the right answer.
• Dad! Suzanne won't give me back my pen case.
Notice that we can also talk about the refusal of a thing to work in the way it should:
• The top won't come off. • The key won't fit the lock.
To talk about general or repeated willingness in the past we can sometimes use would, but we
can't use would in this way to talk about a particular occasion in the past. Compare:
• Whenever I had to go to town, Ron would give me a lift.
• I was late, so Ron gave me a lift to town,

Would

However, we can use would not either when we talk about unwillingness in general or about a
particular occasion. Compare:
• We thought that people wouldn't / would buy the book.
• She wouldn't say what was wrong when I asked,
We use will (or won't) to indicate that we think a present or future situation is CERTAIN:
• You will know that John and Sheila are engaged.
• 'Shall I ask Sandra?' 'No, don't disturb her - she'll be working.'
• We won't see them again before Christmas.