你忘带...了。 usually tell the one what he forget。 (...)

here，可or可是，both are ok 担起=担（得）起 ====== carry/bear ... 担不起 ====== cant carry/bear 担起 is a verb for duty,honour,praise,.... similarly,拿起 is a verb for material object,an apple,book,or something. negative: 担不起 拿不起 ╮(╯▽╰)╭

很类似汉语里的“我吃着饭；我正在吃饭”这样的句子，有时候互换页没关系。 没有什么很大的不同。 这就是传说中的语感吧。 给你一个最典型的例子，记住就行了，毕竟语言不是全是规律性的： 下雨时常用： it‘s going to rain。

i am making a mandarin course recently. 了 着 过 have been put into the same group. they are all used following a verb. "verb+了" is similar with "done" in english. "verb+着" is similar with "doing"... "verb+过" is similar with "have done "... there is a close relationship betweem the word(了,着or过) and the verb.they constitute the whole. but 正在 is different. it just a general adjective to describe the state of the moving compared to 着. another 2 words are put in the same group with 正在 in my course. 已经, means a movement already done 还没, means it's a negative. the movement didn't finish 正在, the movement happening hope it helps

哪一方面呢？ 商务？还是日常口语？

yeah~ some books on 解梦 is really interesting~ but this is just for entertainment ：）

wow 神马actually means 什么，they have the similar pronounciation， pronouncing 什么 as 神马 sounds childish and lovely，even a little stupid~ this word is pop recently ~