"Should" has a more imperative tone, implying some sort of restriction is in place; "shall" gives the listener more freedom to choose. You may interpret "should", "shall" and "must" (bonus!) as: "Should we dance?" -> "I'm not sure if we are allowed to dance or not, shall we do it?" "Shall we dance?" -> "May I have the pleasure of dancing with you?" "Must we dance?" -> "I don't want to dance, are you going to force me to do it?" "I shall go now" -> "I will go now, it is my choice" "I should go now" -> "I think I will go now, or else something bad will happen" "I must go now" -> "If I don't go now, aliens will definitely come and abduct me" The phrase "you shall not pass"/"thou shalt not pass" would be confusing to you, as it implies "you may not pass (as I am currently preventing you from doing it)" more than "you are not allowed to pass (because of the rules)".

Pretty sure it's 木曜日のごご（午後） 木曜日の午後に（この）病院は休みです ... maybe. :P

Yes you can. Although comprehensible, they are considered colloquial, usually used in informal speech. A direct translation of what you wrote would sound like this in English: 1) The day before yesterday, I already went to the office 2) The day before yesterday, I already went to work. You might want to change them to: 1) 我前天开始上班 2) 我前天开始打工 If you mean "I've started going to the office/working the day before yesterday" If you meant to write "yesterday", it's 昨天.

1. 瘦 2. 你 很 面熟 (you have a [very] familiar face) 3. 昨天 载 我 到 机场 的 司机 I have divided the words with spaces to ease your understanding, normally we write them without spaces in between words.