英语中的冠定词a和the一直不懂a和the是什么时候用但我知道a是单数时用比如a pen the是特指的某个东西 比如 the book 但是它们的区别我还是不够清楚 不知道什么时候该用什么 比如说 This is a pen

英语中的冠定词a和the一直不懂a和the是什么时候用但我知道a是单数时用比如a pen the是特指的某个东西 比如 the book 但是它们的区别我还是不够清楚 不知道什么时候该用什么 比如说 This is a pen 请问英语with 和 think应该如何发音,口形如何,主要是不懂其中的th 大虾们帮帮忙,英语发音中thing和that中th如何准确发音,nice中的i和bad中的a如何准确发音? 我该怎么办,数学和英语一直都搞不懂, 用 where 还是 which?Part two is a short monologue __ the candidates must talk about a familiar topic.------------------------------------------------A. whichB. where如上题,一直搞不懂 which 和 where 的区别, 该选哪个呢?希望讲解 英语中的a和an的用法 a和an在英语中的区别 英语中的an 和a如何应用 介绍我和家人生日的英语作文My 12th birthday I had a gread time during my 12th birthday,I will remember it forever!In China,12th birthday is very important in a person's life,so my parents prepared it very carefully.On the morming of that 我一直搞不懂英语踢门解析中的泛指到底是啥子意思.比如：some people fear that___air polluction may bring about changes in _____weather around worldA./,the B.the,/ C.an,the D.the,a比如说这道题答案选的是A 那为毛不 高二英语：这里为什么是were driven up和were dropped?Two other scientists and I were driven up the mountain and dropped as close a possible to the crater that had been formed during th eruption. 英语 .The TV _________ on Channel Five are about sports.A. experiences B. performances C. programs D. problems b和C有点不懂 英语的a和the如何区分这两个词我老是搞不懂,好像用那个都行.感觉就在抠字眼. 英语语法 定语从句中的问题eg：I planted a tree.和 The tree is taller than the house.合并成 The tree which I planted is taller than the house.为什么是在第二个句子中的tree后面加which啊?I planted a tree which is taller th 第5题 英语 a和an 和the 填空 the 60th anniversary of the founding of the PRC 中的 founding A.庆贺 B.创立 C.建设 D.庆典 The first textbook _________for teaching English as a foreign language came out in the 16th century.我还是不懂啊. Decembeir1,2006 is the World AIDS Day?A.17th B.18th C.19th D.20th