WebCEU认为,“It is three years since I have seen him.”的说法是不对的, since后面必须跟过去时saw。 但CGoEL(见该书14.26节)却认为也可以用完成时,并举了下面一例句:It's been a long time since I have seen Gerald.” 以前看过赵振才的语法书,好像(我有点不确信,可能我记错了,也可能没记错)他也认为在以上特定的句型中,since从句中,如果 … Web7 mrt. 2024 · 188 it is + period + since + past or perfect tense. We can say: It is three years since I (last) saw Bill or. It is three years since I have seen Bill. I last saw Bill three years ago or. I haven't seen Bill for three years. It is two months since Tom (last) smoked a cigarette or. It is two months since Tom has smoked a cigarette.
Present Perfect with “For / Since”
Web用法:since从句中常用一般过去时,若从句中是持续性动词的一般过去时,则表示该动作结束有多长时间了.如: It is three years since he smoked.他不吸烟已有3年了. 试比较: It is three years since he began to smoke. t is three years since he has smoked.两句均意为:他吸烟已有3年了. 注意 ... Web22 nov. 2013 · 1. It's three years since I last smoked a cigarette. 2. It's been three years since I last smoked a cigarette. Q1: Are there any differences between them? Do they … folio investments address
Since常见的四种用法_百度文库
Web21 aug. 2008 · 如果是瞬间动词,表示动作并未结束;. 如果是延续性动词,则表示动作已经结束。. It is ten years since I smoked.表示“我戒烟十年了”. It is ten years since I started smoking.则表示“我吸烟十年了”. 你会问我,那. I have never seen him since he has been ill. I have never seen him since he ... Web19 jan. 2024 · It is three years since he smoked. 他不吸烟已有3年了。 试比较: It is three years since he began to smoke. It is three years since he has smoked. 两句均意为:他 … Web2 jun. 2009 · It's three years since he last smoked a cigarette. Similarly, the last time when he smoked was three years ago. I think what the speaker knows is no mre than such a thing. But the sentence is interpreted as "He gave … ehhh roblox face