Comparing "because" and "for"

0 I'm confused with "beacuse" and "for", so I have listed several pairs of sentences using the two words. 02br
00Please check them out for me and tell me which of them are acceptable and why, thank you very much for your help! 02br
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00He must be a fool,01b00 for02b00 he says so. 02br
00He must be a fool 01b00becuase02b00 he says so. 02br
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00The day breaks 01b00for 02b00the birds are singing. 02br
00The day breaks 01b00becuase 02b00the birds are singing. 02br
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00The river has risen,01b00 for02b00 it has rained much of late. 02br
00The river has risen01b00 becuase 02b00it has rained much of late. 02br
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00He must be rich,01b00 for02b00 he could afford that car. 02br
00He must be rich 01b00becuase02b00 he could afford that car. 02br
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00I am a lucky fellow, 01b00for02b00 I have such an income. 02br
00I am a lucky fellow 01b00becuase02b00 I have such an income. 02br
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00She's gone for a walk,01b00 for02b00 the rain has stopped. 02br
00She's gone for a walk01b00 becuase02b00 the rain has stopped. 02br
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00You are no gentleman,01b00 for02b00 you hit a lady in the face. 02br
00You are no gentleman 01b00becuase 02b00you hit a lady in the face. 02br
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00You were lucky,01b00 for02b00 you had won the game. 02br
00You were lucky 01b00becuase 02b00you had won the game. 02br
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00Thank you! 0-