为什么这里第三人称用have不用has

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• 什么时候用have什么时候用 has?has用于第三人称单数（如：he、she、it……）have用于第三人称复数（如:we、they……）和第一人称（如：I、you……）——————————————————————————————————除此之外还有什么规则?还有、当主语是some flowers之类的some+名词的时候使用has还是have希望再给我讲讲are和is的区别
• 第一问：Then man【tried out】 several 【means】 to have those people get across what he said.请问这里的tried out和means分别是什么意思?=第二问：It's obvious that her refusing to see a doctor has ____(led in/resulted in) her illness woresening.请问led in没有导致,造成的意思吗?为什么答案是result in?=第三问：It's nice to see millions who had nothing but 【a record of】 misery and hungry _____（have/to have) the chance to improve their life and livig conditions.①请解释黑框中的a record of应该怎么理解.②请问为何横线处只能用have?我脑子
• 1.You are my first good friend here.这里为什么用my而不用my the?2.My father can wear it for playing basketball.为什么用playing?3.many和much和lot of的区别.4.Let Kate come to Huaxing Clothes Store soon.为什么是come to 5.Mary needs a bag for school.为什么用for不用to?6.I'll take that pair of shoes.为什么用take不用want和need?7.这件绿色的T恤this green T-shirt为什么用this不用the?8.one和ones的用法.9.bring的对应词。
• He has been able to tell us more about active volcanoes than any man alive.这里为什么是用现在完成时,而不是一般现在时?
• If you have ( ) time ,would you make some coffee for me?A.any B.some这里为什么不用any?不受后面的疑问句影响么？Welcome to my home.（改成同义句）You ( )( ) to my home.为什么这里不能填are welcomed被动语态？而要用 are welcome形容词？Mark Twain was his pen-name.(反义疑问句）Mark Twain was his pen-name,wasn't ( 后面那个空为什么不是it而是he？
• who have got和who has got区别who have got和who hase got区别为什么有时候用who have got有时候用who has got比如who has got some small change?不能用have got吗
• I have heard him speak about you often.为什么用speak而不用speaks?
• Her class is so much fun.为什么用is 不用has
• when he saw it happening,he called the police.这里的为什么用happening?而不用happened呢?
• 29 ___ (catch) the last bus,he had to go home by taxi.为什么用NOT having caught 不用Not have caught.
• 应用题,明天交
• 某人将20000元人民币投资于一合作公司，一年还本付息后他取出10000元，剩余的本息再次投入该公司，再经过一年取得本息共13200元，若该公司两年付息的年利率不变，那么年利率是多少？