當(dāng)以there,here,out ,in ,up ,down,away 等副詞開頭的句子,為了起到強(qiáng)調(diào)的作用,可構(gòu)成倒裝句,只把副詞放在句首,主語和謂語位置調(diào)換,不加助動(dòng)詞.
Our teacher came in.
In came our teacher.
這種倒裝要求：主語必須是名詞.主語是人稱代詞時(shí),主語和謂語語序不變.
Here it is.
上述題中,第1題和第3題都屬于這一類.不同的是第1題中的主語I屬于人稱代詞,所以主語和謂語語序不變.而第三題的主語a pretty girl 是名詞,所以 主語和謂語位置調(diào)換.
so + 動(dòng)詞+主語 (對前面肯定意義的事情表示相同)
neither/ nor + 動(dòng)詞+主語 (對前面否定意義的事情表示相同)
表示兩人的同樣一個(gè)情況時(shí),只能表示一件事,即上、下句所使用的動(dòng)詞、時(shí)態(tài)要一致.
否則要用so it is with…
You can ride a bike.So can I .你會(huì)騎自行車,我也會(huì).
He has been to Beijing.So have I .他去過北京,我也去過.
The first one isn’t good,neither is the second.第一個(gè)不好,第二個(gè)也是（不好）.
His uncle is a worker and has been working in the factory for more than ten years.So it is with his aunt.他的叔叔是一個(gè)工人,已經(jīng)在工廠工作十年多了.他的嬸嬸也是一個(gè)工人,已經(jīng)在工廠工作十年多了
第2題 前面的Society has changed 是肯定意義,所以用"so + 動(dòng)詞+主語" 的結(jié)構(gòu)；另外,前后兩部分所使用的動(dòng)詞、時(shí)態(tài)要一致,前面是現(xiàn)在完成時(shí)態(tài),所以后面也相應(yīng)的用現(xiàn)在完成時(shí)態(tài).
第四題屬于 虛擬條件句的倒裝
根據(jù)給出的句子的后半部分"they would certainly come and help us"和選項(xiàng),我們可以推出,原句子是If they had time,they would certainly come and help us.
有些由if引導(dǎo)的條件狀語從句（主要是包含有were,had,should的從句）,可以把if 省略,把上述動(dòng)詞放到主語前面去.