if引导的条件状语从句用动词原形还是非谓语动词
[1]状语从句,谓语,相关知识点带有until状语从句的主句谓语有何特点正：We didn’t stop until he came. 直到他来我们才 停止。误：We started until the rain stopped. 正：We didn’t start until the rain stopped. 直到 雨停我们才开始。误：He finished it until it was dark. 正
请看下面的句子，空格处应填动词原形还是非谓语动词：
[2]谓语动词,动词,相关知识点谓语动词切忌用“行为动词1 + 原形动词”、“be + 原形动词”。○4have+过去分词。如：Many trees have been cut down since 1970s.（意思同上）○5般时问句和否定句中：do/does/did+原形动词。如：He does not enjoy himself very much.（他日子过的不好。）Did any of you se
If they don't understand it the first time, _________ over it again until they do.
A. going B. to go C. gone D. go
【分析】此题正确答案选D，其余几项均有可能被误选。空格前 if 引导的是一个条件状语从句，而在空格处无论是填A、B或C，它都是一个非谓语动词短语，而不是一个句子，这样一来，整个句子没有主句，从而导致结构不完整。若选D，则 go over it again until they do 则是一个句子(祈使句)，在此用作主语。又如：
[3]谓语,主语,相关知识点the rest (of)等作主语，谓语的数取决于什么c. Half of the money was spent on food. 有一半的钱用来买食物。3. a. 30 percent of the workers here are women. 这里的工人有30%是女性。b. 30 percent of the work has been done. 有 30% 的工作已
(1) If he likes to eat it, _________ him some more.
[4]some单词记忆法◆记忆方法一：联想方式：so收；me我她终于肯收我的一些礼物◆记忆方法二：联想方式：so收；me我记忆方法：她终于肯收我的一些礼物
A. give B. giving C. given D. to give
(2) If anyone calls, _________ them I'm not at home.
A. tell B. telling C. told D. to tell
(3) When your mother comes back, _________ her to come to school at once.
A. ask B. asking C. asked D. to ask
(4) While the baby is sleeping, _________ your work as soon as possible.
[5]possible单词记忆法◆记忆方法一：联想方式：po破；s叔；si是；ble伯乐穿着破旧的大叔是个伯乐，这是可能的◆记忆方法二：谐音：怕死不 怕死不是不可能的！◆记忆方法三：分析：pos --- ―破损‖的拼音首字母 sible --- ―死不了‖的拼音首字母； 记忆：它（猫或狗）可能是皮肤破损了，暂时还死不了。◆记忆方法四：分析： po――“婆”的拼音；s――外形像蛇；si――“死”
A. finish B. finishing C. finished D. to finish
答案均选A，空格前分别为 if, when, while 引导的状语从句，空格处填动词原形，构成祈使句，用作句子主语。
[6]祈使句,主语,相关知识点行为动作的主语为第一、三人称时，祈使句通带以Let开头： Don't ask me why. Don't be late. Don't 1et there be too much noise. Never buy what you cannot pay for.（也可用Never）3.祈使句＋and／or结构 这类结构常可与含if从句的复合句相互转换：
if相关单词意思与记忆法：
if单词意思解释释义：
conj. 如果, 是否, 无论何时, 假设, 即使n. 条件【计】 DOS批处理命令:根据所测试的条件决定是否执行另一条命令相关词组: If weather permits... if only if so as if if at all if it had not been for if I were you
if单词相关例句：
Freedom is the freedom to say that two plus two makes four. If that is granted, all else follows.——Ceorge Eric Blair Orwell.British novelist 自由是指人们有说“2+2=4”的自由，有了这一保证，其他一切便会随之而来。英国小说家奥韦尔 .G.E.B.
No one can degrade us except ourselves; that if we are worthy, no influence can defeat us.——B.T.Washington, American educator除了我们自己以外，没有人能贬低我们。如果我们坚强，就没有什么不良影响能够打败我们。美国教育家 华盛顿 B T
If it is not right, do not do it; if it is not true, do not say it. (If it is not broken, do not fix it.) 不正确的事不做，不真实的话不说。
I hate to see things done by halves. -- If it be right, do it boldly, --if it be wrong, leave it undone. 事情不要做一半；对的，就做下去，不对，就丢开。
Industry if fortune's right hand, and frugality her left. 勤勉是幸福的右手，节俭是幸福的左手。
Speak clearly if you speak at all, Carve every word before you let it fall. 要说就索性说得一清二楚，说出前每句话要字斟句酌。
If Enterprise is afoot, wealth accumulates whatever may be happening to Thrift; and if Enterprise is asleep, wealth decays, whatever Thrift may be doing.John Maynard keynes British economist如果企业在进展，不论节俭不节俭，财富也在衰落。国经济学家 凯恩斯 .J.M.
The laws of Nature, that is to say the laws of God, plainly made every human being a law unto himself, we must steadfastly refuse to obey those laws, and we must as steadfastly stand by the conventions which ignore them , since the statutes furnish us peace, fairly good government and stability, and therefore are better for us than the laws of God, which would soon plunge us into confusion and disorder and anarchy if we should adopt them.Mark Twain, American writer自然法即神灵法，只是用来约束每一个个体的法律，我们必须坚定地拒绝遵守。我们应该坚定地遵守忽视神灵法的规章制度，因为规章制度赋予我们和平、比较好的政府和稳定，因而对我们来说，规章制度比神灵法更好，因为如果我们采用神灵法的话，他会将我们陷入迷惑、无序和无政府状态。美国作家 马克·吐温A
If you are too fortunate, you will not know yourself; if you are too unfortunate, nobody will know you. 运气太好，得意忘形；运气太坏，无人理会。
Man loves company even if it is only that of a small burning candle. 人喜欢伴侣,哪怕只是一根点着的小蜡烛也好.
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