同学你好，该知识点来自沪江网校《英语零基础直达PETS四级/公共英语四级【全额奖学金班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
第一篇：
1.首行要加上写给谁的，因为不清楚写给谁的，可以用To whom it may concern表示写给相关方
2.第一句买的过去式是bought，不是brought
while I was watching TV：while比when更适合与进行时连用，I在句中要大写
3.打开电视不用open，用turn on
I have turned it on for only 3 times
it与turn on之间是被动关系，所以后面无法打开，用it cannot be turned on
4.半小时half an hour
5.I am afraid that it will blow up
6.On the other hand
7.The remote control didn't work xxx
8.It's very curious in than i want you change for a new one for me这一句也有问题，但因为不是很清楚同学想表达的意思，所以不知该如何修改
第二篇：
1.for+doing。用meeting us
2.I have something urgent to deal with
3.It‘s all of a sudden and I terribly apolopize xxx
postphone to another time
4.then不是than哦~
希望对同学有帮助哦~