1.should作助動詞主要用於過去將來時,用於第一人稱: I told him that I should see her on Friday. 我告訴他星期五我會見到她。 I thought I should never see you again. 我還以爲(wèi)再也見不到你了。 He hoped that we should support him. 他希望我們支持他。 2.在更多情形下表示“應(yīng)該”,“應(yīng)儅”,用於各個人稱,作用接近情態(tài)動詞: What time should we meet? 我們應(yīng)儅在什麼時候碰頭? You should do it for your own good. 爲(wèi)了你自己你應(yīng)該這樣做。 She shouldn't leave so soon. 她不應(yīng)儅這麼快就走。 should後麪有時可用完成或進(jìn)行形式: I should have thought of it. 這一點我是應(yīng)該想到的。(但我沒想到。) They should have told me. 他們應(yīng)儅事前告訴我。(但沒這樣做。) You shouldn't be sitting here doing nothing. 你不應(yīng)儅坐在這裡什麼也不乾。 3.用在某些從句中: He suggested that she should come to Paris. 他建議她到巴黎來。 It will be better that he should be out of France. 他最好離開法國。 I was anxious that our plan should not fail. 我亟盼我們的計劃不失敗。 4.用在某些從句(甚至主句)中表示驚異、不以爲(wèi)然等情緒: It's dreadful that they should be so miserable. 真可怕他們竟然這樣悲慘。 Why should you talk to me like that? 你怎麼竟然和我這樣講話? It's unfair that this should happen to us. 我們竟然發(fā)生這樣的事,這是不公平的。 5.用在虛擬條件句中,用於第一人稱後(這時用would時更多一些): I should never have done it if I hadn't been so hard up. 要不是我処境這般睏難我絕不會這樣做。 We shouldn't have won without you. 要不是你我們不會獲勝。 Should I be free,1 will come. 如果我有空我會米的。 6.用在某些句子中使口氣顯得比較婉轉(zhuǎn)(a)或用來表示揣測(b): a.I should like to have a try. 我想試一試。(比I like...更委婉。) I should think so.我想是這樣的。(比I think...更委婉。) b.They should be there by now. 現(xiàn)在他們想必己到達(dá)。 The book should come out in a month. 這書一個月後估計可出版。