一般現在時,現在進行時,一般過去時肯,否,疑各10句

一般現在時,現在進行時,一般過去時肯,否,疑各10句

1 He often goes to school by bike.
The earth moves around the sun.
I like soccer.
It is sunny today.
The morning class begins at 8:00.
We study at No.2 High School.
They are in the same class.
Maria is from Cuba.
你這要求太離譜了,一個十句,累死了,還沒有分數.還不如我給你一個時態寫一個句子,然後教給你句型變法.肯定句、否定句、疑問句都是有一定規律可循的.
一般現在時、一般過去時、現在進行時、一般將來時各5句,
一般現在時:I do my homework every day.I go to school onfoot.Hecanswim.Thereare seven days in a week.I like watching TV.一般過去時:I went to schoolyesterday.Lastweek I read an Englishbook.Hew…
用一般現在時、一般過去時、現在進行時3個時態寫英語作文
一般現在時、一般過去時、現在進行時3個時態英語作文
一般現在時
Hello,everyone.Myname is Kelly.I am friendly and honest.I am good at English and maths.I like surfing the internet,playing computer games,watching TV and traveling.I also like playing table tennis and I am good at it,too.I often play table tennis with my friends onweekends.AndI want to be a famous table tennis player when I growup.WhatI likemost is to see the seagulls flying freely in the sky so I often go to the sea insummer.Myfavourite colour is white because I think white is symbolize purity.
大家好我的名字叫KELLY .我很友好、誠實.我擅長英語和數學.我愛上網、玩電腦網路遊戲、看電視和旅遊.我也喜歡打桌球.我經常和朋友們在週末打桌球,長大了我想當一個桌球運動員.最喜歡在海邊看著海鷗自由自在的飛翔,囙此在夏天我經常去海邊.白色是我的最愛.因為我覺得白色是純潔的象徵.
一般過去時
Our First Day in Winter Holiday
The winter holiday begantoday.TheSpring Festival will comesoon.Somy sister and I decided to help our mother to clean the room.
In the afternoon we began thecleaning.Wefirst dusted thewalls.Thewalls turned white soon,but the tables and floor were covered withdust.ThenI cleaned the tables while my sister swept thefloor.Theroom became bright andclean.Wewere very happy.
Then my sister did somewashing.Withmy help,my sister first washed clothes,then some shoes.
Finally,we finished the work.“What time is it now?”she asked.“Oh,it's six o'clock!It is time for Mum to comehome.Wemust prepare thesupper.Bequick!“Isaid.Justthen our mother camein.Whenshe saw the room clean and bright she was very happy.“You are my good daughters!”she said with a smile on her face.
Now I was very tired,but I was very happy,because I had done something tbr my mother.
寒假的第一天
今天開始放寒假.春節快到了,我和姐姐决定幫媽媽做一次大掃除.
下午大掃除開始.我們先撣牆上的灰,牆很快變白了,但案頭和地板上佈滿了灰塵.於是,我抹桌子,姐姐掃地.最後,房間變得乾淨亮堂了.我們很高興.
接著,姐姐開始洗衣服,我在一旁幫忙.洗完衣服,姐姐又洗鞋.等全幹完了,姐姐問:“幾點了?”“喲,6點了!媽媽要回來了.我們得做晚飯了,快!”我說.這時,媽媽進來了.她看見房間既清潔又明亮,非常高興.她笑容滿面地稱讚道:“你們是我的好女兒!”
我雖然很累,但很高興,因為我為媽媽做了一點事.
現在進行時
Now,as today is my birthday,we are having a party in myhouse.Allmy friends have arrived and they are veryhappy.Someof them are singing and dancing,others are watching TV and eating deliciousfood.Myfriends give me so many gifts,which make me surprised andmoved.Allthe people are trying their best to make the partyfunny.Ina word,we are having a good time.
因為今天是我生日,所以現在在我家正舉行聚會.我所有的朋友都已經到了,他們都很開心.有的人在唱歌跳舞,其他人在一邊吃美味的東西一邊看電視.我的朋友送了我很多禮物,讓我既驚訝有感動.所有人都在盡力讓聚會變得更加有趣.總之,我們都過得很開心.
注:根據自己的情况可以改一下內容
方程ax的平方+2x+1的解組成的集合沒有元素時,實數a的取值範圍是?
解由方程ax的平方+2x+1=0的解組成的集合沒有元素時
知方程ax的平方+2x+1=0無解
當a=0時,方程為2x+1=0,解得x=-1/2,即方程有解,
當a≠0時,方程為二次方程此時Δ<0
即2^2-4a<0
解得a>1.
a大於1
題目不全追問:額,這是老師給的,我也覺得不太對勁……
已知函數y=f(x)滿足f(x)=2f(x分之一)+x,求f(x)的解析式
f(x)=2f(1/x)+x①
把x看成1/x則
f(1/x)=2f(x)+1/x②
由①②解得f(x)=-2/3x-x/3
令x=x分之一
設x=1/x,則有f(1/x)=2f(x)+1/x,兩式消去f(1/x),得y=-1/3(x+2/x)
怎樣用描述法表示二次函數y=x平方影像上的點組成的集合?
{(x,y)|y=x^2}
若方程ax^2+bx-4=0(a,b屬於實數集,a>0)有兩個實數根,其中一個根在區間(1,2)內,則a+b的取值範圍是(A)
A.(-wuqiong,4)B.(4,+wuqiong)C.(-wuqiong,-4)D .(-4,4)
麻煩幫幫忙.怎麼解,請注意答案選A
f(1)f(2)
函數fx滿足fx+2f(1/x)=x,則f(x)=
f(x)+2f(1/x)=x
f(1/x)+2f(x)=1/x
解得
f(x)=2/(3x)-1/3
二次函數y=x(方)-4的函數值組成的集合
選擇適當的方法表示下列集合
用描述法,因是二次函數,先確定頂點(0,-4)
那麼y就須大於等於-4,即{y屬於R/y大於等於4}
已知映射f:A→B,其中A=B=R,對應法則f:y=-x2+2x,對於實數k∈B,在集合A中不存在原象,則k的取值範圍是()
A. k>1B. k≥1C. k<1D. k≤1
∵y=-x2+2x=-(x-1)2+1≤1∴函數的值域為(-∞,1]∵對於實數k∈B,在集合A中不存在原象∴k>1故選A