1、八年級上冊2單元英語語法I頻度昌詞的用法【頻度副詞的概念】表示動作發(fā)生頻率的副詞叫頻度副詞。英語中常見的 頻度副詞按動作發(fā)生的頻率從高到低依次排列為： always （總是）usually （ 通常）often （ 經(jīng) 常）sometimes（ 有時）seldom （彳艮少，不常） hardlyever （ 幾乎從不）never （ 從不）/When do you usually have breakfast?gn Sunday we often get together to chat.zMy sister hardly ever plays computer games.我妹妹從來不玩電月

2、而游戲。【頻度副詞的用法】1.通常情況下，頻度副詞應(yīng)放在實義動詞之前，助動 詞、情態(tài)動詞或he動詞之后。z2My father usually goes to work by bike.我爸爸通常騎自行車去上班The old lady is always kind to us.那位老奶奶對我們總是很友好。z2Mary does not always wear a dress.瑪麗不總是穿連衣裙。注意：在下面兩種情況下，頻度副詞可位于助動詞、情態(tài)動詞或be動詞之前:(1)在白中表強調(diào)時，頻度副詞應(yīng)置于助動詞等之前，且此時助動詞、情態(tài)動詞或be動詞應(yīng)重讀。ZLiMing always was la

3、te.李明老是遲到。(2)在簡略答語中，當頻度副詞與助動詞、情態(tài)動詞或be動詞位于句末時，頻度副詞必須前置。A-Do you often go to the library?你經(jīng)常去圖書館嗎？誤:-Yes, I do often. 是的，我經(jīng)常去。正:-Yes, I often do. 是的，我經(jīng)常去。A- Xiao Ying is late again.小英又遲到了。-Yes, she always is.是的，她總是遲到。2.頻度副詞可位于句首，也可位于旬末。(1)位于句首的用法：sometimes 可用于句首，和用于句中含義相同。/Sometimes I watch TV in the

4、evening.晚上我有時候看電視。often用于句首時，常用來表示強調(diào)，前面通常用quite, very 修飾。/Very often Tom comes late for school.湯姆上學(xué)常常遲到。usually有時也用于句首，但前面不用修飾語。Usually My mother gets up early.我媽媽通常起得很早。seldom, never 用于句首時，句子要用倒裝形式加 強語氣。zNever have I been to Australia.我從未去過澳大利亞。ZBeldom do I play computer games.我很玩電腦游戲。always通常不用于句首

5、，但是在祈使句中例外。Always lock the door when you leave.當你離開時要時刻記得鎖門。(2)位于句末的用法：sometimes可用于句末。ZWe have a picnic sometimes.我們偶爾去野餐。ofen有時可置于旬末，但通常會帶有very, quite, more, so 等修飾語。/When I was a child, I used to play tennis very often.當我是一個小孩子的時候，我經(jīng)常打網(wǎng)球。在否定句和疑問句中，當often用于旬末時，前面 可不帶修飾語。/Does your uncle come here o

6、ften?你叔叔經(jīng)常來這兒嗎？He doesn' t come here often.他不常來這兒。【練一練】單項選擇。()1.-Do you often go to the gym?-No,. I don' t like sports at all.A. alwaysB.neverC. sometimesD. usually()2. My cousin wants to keep slim. She does exercise every morning and eats meat.A. seldomB. alwaysD. often()3. He often works l

7、ate at night, so he ever goes to bed before 10 o' clock.A. oftenB. neverC. hardlyD. always()4."He walks to school everyday.means " He walks to school.A. seldom B. oftenC. usually D. always()5. -Do you like meat?-No, I don' t. But I have some pork for lunch.A. alwaysB. seldomC. neve

8、rD. sometimes()6.David was so excited at the good news that he could say a word.A. nearlyB. hardC. everD. hardly ()7.l watch this TV programme. It ' S very interesting.A. oftenB. neverC. hardlyD. seldom()8.- Lili, “the most beautiful teacher hasmoved us deeply.Yes, and she is popular with her students.A. sometimesC. alwaysD. hardly() 9. Can you pass my glassesto me, Betty? I can see the words onthe blackboard.A. reallyB. hardC. onlyD. hardy()10. She