把下面的英语句子改成正确的 关于run-on 和 fragment 的知识点 如果没涉及到也请改正 谢谢

把下面的英语句子改成正确的 关于run-on 和 fragment 的知识点 如果没涉及到也请改正 谢谢

I felt scared and be careful to everyting because this was my first time to stay with mant students who different races from me for a long time.

I just automatically ignored the saying because almost nobody was dare to ask their professors questions based on my past experiences in my home country. 

In addition, she encouraged me that if I have any question about the economic class, I can just make an appointmenr during office hours, or send an e-mail to her, she will try to solve my problems as soon as possible.

没大错,主要是时态一致的问题.
I felt scared and was careful to everyting because this was my first time to stay with (mant ) students who were different races from me for a long time.
I just automatically ignored the saying because almost nobody was dare to ask their professors questions based on my past experiences in my home country.
In addition,she encourages me that if I have any question about the economic class,I can just make an appointmenr during office hours,or send an e-mail to her,she will try to solve my problems as soon as possible.
再问： 这几句话主要是写在同一篇作文里 所以主要用过去时 可以再帮我改改吗
再答： 如果这样，第三段也应该用过去时。
I felt scared and was careful to everyting because this was my first time to stay with (mant ?) students who were different races from me and for a long time. I just automatically ignored the saying because almost nobody was dare to ask their professors questions based on my past experiences in my home country. In addition, she would encourage me that if I had any question about the economic class, I could just make an appointment during the office hours, or send an e-mail to her, she would try to solve my problems as soon as possible.

注意，最后一句的send是与make并列的，因前面有could，所以两词都用原型。
再答： 补充一下。
…… she would encourage me that……里的that 多余了。