I'm very tall .It was because I was so tall that I became the tallest of my class.强调句对吗?I used to be very heavy,just like a ball.How quickly time flies （这句话用这样的形式没问题把?别人都说用How time flies就可以了.）

I'm very tall .It was because I was so tall that I became the tallest of my class.强调句对吗?I used to be very heavy,just like a ball.How quickly time flies （这句话用这样的形式没问题把?别人都说用How time flies就可以了.）
I'm very tall .It was because I was so tall that I became the tallest of my class.
强调句对吗?
I used to be very heavy,just like a ball.
How quickly time flies （这句话用这样的形式没问题把?别人都说用How time flies就可以了.）Let's streasure time.(time 前有冠词the吗?）

I'm very tall .It was because I was so tall that I became the tallest of my class.强调句对吗?I used to be very heavy,just like a ball.How quickly time flies （这句话用这样的形式没问题把?别人都说用How time flies就可以了.）
It is because I am so tall that I was once(am) the tallest of my class.
你高是一个事实,因为显而易见你不会越长越矮所以不用过去时而用一般现在时.
你是想表达你在你们班第一高还是你曾经是你们班最高的?如果你曾经是,就用once和过去时态,如果现在仍然是,就用一般现在时.
第二个,你曾经很胖用big,其实一般口语中也不用fat,不要用heavy表示重,英文没这个用法.其次后面用like,这是个介词,不是动词,所以不受时态限制不加d
第三个,how time flies,以及充分表现了时间飞逝的状态,不用加quickly 了.珍惜时间是treasure/cherish time, 不过放在你本句中,你最好用we should cherish it.we should在这比lets地道些,用it避免重复.

都对

I am very tall. I am so tall that no one else in my class is taller than me. (即使这样也不能叫强调句.而且你为什么突然在第二句就改用过去时态?)
I used to be very fat, just like a ball. (ball不能用heavy来形容吧?)
How time flies! Let's treasure time. (不用加冠词.)

呃...- -|||读上去...觉得...确实是..有问题的说...
It was because I was so tall that I became the tallest of my class.这个because后面要加that,不然一个单句里那么多谓语就不对了. 而且这句子没必要用强调句 你说这理由有什么好强调的 有没什么意义 而且还很复杂不容易写对. 还有就是 你这么写 很容...

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呃...- -|||读上去...觉得...确实是..有问题的说...
It was because I was so tall that I became the tallest of my class.这个because后面要加that,不然一个单句里那么多谓语就不对了. 而且这句子没必要用强调句 你说这理由有什么好强调的 有没什么意义 而且还很复杂不容易写对. 还有就是 你这么写 很容易被读成so...that的句子 也就是"太...以致于...".嗯 还有 没必要用过去式啊```
How time flies确实是这样用 不用quickly 因为这是习惯用法 人家都不这么说 也就是没人承认这是对的 所以你还是用How time flies吧
内个streasure不认识诶...你是不是想说let's treasure time啊 不用加the

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because 与i 之间加个that 这句话你应该把It was because去掉留后面的句子就无懈可击了 I was so tall that I became the tallest of my class
后面的确实应该就说How time flies！不能用中式思维去看这句话 本身这句话就有时光飞逝的意思 不用加quickly 不要字面理解