時間引導詞:when , after , before , while , until , till , since , as soon as , everytime , the moment等
地點引導詞:where , wherever等
原因引導詞:because , since=now that , as等
條件引導詞:if , whether , unless , as long as ,on condition that , providing that等
結果引導詞:so / such ... that , so等
目的引導詞:in order that , so that等
讓步引導詞:though , although , however , whatever=no matter what even if , even though , as (倒裝) 等
方式引導詞:as , as if等
比較引導詞:than , as ... as , the more ... , the more ... 等
二、真題舉例
例句1:While formal learning is transmitted by teachers selected to perform this role , informal learning is acquired as a natural part of a child's development .
【重點詞匯解析】transmit,vt. 傳輸、傳播 vi. 傳輸、發射信號;(in)formal,adj. (非)正式的
例句2:While it is true that this competition may induce efforts to expand territory at the expense of others , and thus lead to conflict , it cannot be said that war-like conflict among other nations is inevitable , although competition is .
例句3: While it is true that to date the Internet seems to be favoring the most developed sectors of the international community over the less developed , this need not always be the case .