高中英語 語法專題 連詞課件 新人教版必修4.ppt

連 詞 conjunction,連詞是一種虛詞， 它不能獨立擔任句子成分。用來連接詞，短語，從句與句子。,連詞主要可分為兩類： 并列連詞 從屬連詞,并列連詞表示詞，短語， 從句或句子之間具有并列關系。 可以表示平行關系，轉折關系，選擇關系 和因果關系。,and (和) both and（和,兩者都） neither nor（既不也不） not only but also(不但 而且) as well as (和, 也, 除外, 而且),1.表示平行關系的連詞：,as well (也,而且,) 用于句末.,他是一個科學家, 而且也是一個詩人.,He is a scientist, but he is a poet as well.,He is a scientist as well as a poet.,他們也會來嗎?,Are they coming as well?,2.表示轉折關系的連詞:,but while (而, 雖然) yet (可是) however (而) whereas (而) nevertheless(然而, 不過),3.表示選擇關系的連詞,or(或則,否則) or else(否則) otherwise(要不然) eitheror(或者 或者)rather than (而不是),4.表示因果關系的連詞,so for thus(因此) hence （因此） therefore （因此）consequently（因而，所以）,二.從屬連詞是用來引導連接主句和從句的連詞。 分為引導名詞性從句的連詞和引導狀語 從句的連詞。,1. 引導名詞性的從句,(1). that,whether,if 不充當成分.,(2). 連接代詞 who, whom, which, what 充當主, 賓, 定, 表語等.,(3). 連接副詞 when, where, how, why 狀語.,2. 引導狀語從句的連詞,(1). 時間: when, while, as 當時 when+瞬間,延續(xù)性動詞 while+延續(xù)性動詞 as+瞬間,延續(xù)性動詞 “一邊一邊” till/until, once, as soon as(一就), the moment/instant(一就), no sooner than hardly when the moment,(2). 原因: as because for since,For語氣最弱, 引導的分句放在句末. Because 語氣最強, 句首,句末均可. As(因為) 置于句首. Since(既然) 通常置于句首.,(3). 地點: where, wherever,(4). 條件: if, unless= if not, so/as long as suppose(that)假使 on condition that如果 provided/ providing (that) 倘使, 如果,now that(既然) considering that,(5). 讓步: though/ although不與but連用. as(盡管), even if/ though (即使) however(無論怎樣), whatever no matter how/ who/ which,Although/though 和as(盡管) 的區(qū)別: Although/though引導的從句用正常語序. As 引導的從句用倒裝語序, 即把as從句中的表語,狀語或動詞原形提至主語前.,盡管天氣冷,可他仍繼續(xù)工作.,Though it was cold, he went on working.,= Cold as it is , he went on working.,盡管你讀得快, 你也不能在三天內讀完這本書.,Fast as you read, you cant finish reading the book in three days.,Although you read fast, you cant finish reading the book in three days.,不管他怎樣努力, 還是擺脫不了困難.,Try as he might, he could nt get rid of the difficulty.,