18.每当我听到...我就忍不住感到兴奋。WheneverIhear...,Icannotbutfeelexcited.
每当我做...我就忍不住感到悲伤。WheneverIdo...,Icannotbutfeelsad.每当我想到...我就忍不住感到紧张。WheneverIthinkof...,Icannotbutfeelnervous.
每当我遭遇...我就忍不住感到害怕。WheneverImeetwith…,Icannotbutfeelfrightened.
每当我看到...我就忍不住感到惊讶。WheneverIsee...,Icannotbutfeelsurprised.
例：每当我想到我家附近那一条清澈的小溪，我就忍不住感到悲伤。
WheneverIthinkofthecleanbrooknearmyhome,Icannotbutfeelsad.
=EverytimeIthinkofthecleanbrooknearmyhome,Icannothelpfeelingsad.
19.据说...Itissaid(that)子句
一般认为...Itisthought(that)子句
大家都知道...Itisknown(that)子句
据报导...Itisreported(that)子句
一般预料...Itisexpected(that)子句
一般估计...Itisestimated(that)子句
一般相信...Itisbelieved(that)子句
例：一般相信阅读增加我们的知识、扩大我们的心胸。
Itisbelieved(that)readingincreasesourknowledgeandbroadensourmind.
20....的主要理由是...
Themainreasonwhy...is(that)子句例：青少年犯罪的主要理由是社会环境日一败坏。
Themainreasonwhythejuvenilescommitcrimesisthatsocialenvironmentisbecomingworse.
21.俗语说得好：...。
Wellgoesanoldsaying,"…"
=Asanoldsayinggoes(runs,says),"…"
=Anoldsayinggoes,"…"
Asanoldsayinggoes,"Honestyisthebestpolicy."
22.(A)...用下列方法inthefollowingways.
(B)…有三个主要理由。…forthreemajorreasons.
(C)要...至少我们可做三件事。To...,thereareatleastthreethingswecando.
例：(A)我用下列方法增加信心。
Iincreasemyconfidenceinthefollowingways.
(B)人们学外语有三个理由。
Peoplelearnaforeignlanguageforthreemajorreasons.
(C)为了维护健康，我们每天至少可做三件事。
Tokeephealthy,thereareatleastthreethingswecandoeveryday.
23.那就是(说)...;亦即…
Thatistosay,.
=Thatis,.
=Namely,...
例：我们生活需有规律。也就是说，早睡早起，戒除烟酒。
Weneedtolivearegularlife.Thatis,wecankeepgoodhoursandrefrainfromsmokinganddrinkinginthedailyactivities.
24.(A)基于这个理由...Forthisreason,...
(B)为了这个目的…Forthispurpose,...
例：基于这个理由，我已决定把行医作为未来的职业。
Forthisreason,Ihavedecidedtotakepracticingmedicineasmyfuturecareer.
25.我们有理由相信…
Wehavereasonstobelieve(that)子句
例：我们有理由相信体罚应该严格禁止。
Wehavereasonstobelievethatcorporalpunishmentshouldbestrictlyprohibited.