英語句中動詞在什麼時候變為複數？

英語句中動詞在什麼時候變為複數？

前面的幾個人都錯了，應該是：當主語是非第三人稱單數時，謂語動詞用複數或者用動詞原形；如果主語是第三人稱單數，如he，she，it等時，謂語動詞則用單數形式.
在第三人稱單數的時候動詞變為複數
在he/she/it後面
主語有兩個或兩個以上
設z是複數且滿足|z|^2+zi-z把i≤0，則Rez+imz的取值範圍？
設z=x+yi.gz=x-yi.（x，y∈R），則|z|²；+zi-gzi≤0.x²；+y²；－2y≤0.===>x²；+（y-1）²；≤1.可設x=rcost，y=1+rsint.（t，r∈R，且0≤r≤1）.===>x+y=（√2）rsin[t+（π/4）]+1.===>1-√2≤x+y≤1+√2….
設z=a+bi，則a^2+b^2+ia-b-a-bi《0，所以a^2+b^2-b-a《0，且a-b=0，所以2a^2-2a《0，0《a《1，同理，0《b《1，Rez+imz=a+b，則0《Rez+imz《2
英語片語造句.
fell asleep，right away，get out of，wake up，a science fiction，at first，put out of，play joke，the day before，in fact，need to分別造句
Go fall aseep.
I'll do it right away.
Get out of my house.
Wake up now.
I read a science fiction last night.
You were wrong at first.
If you take my advice，you wouldn't put out of your last chance.
Don't be serious，I just play a joke.
Tom came to school the day before yesterday.
In fact，I don't believe you at all.
I need to know the truth.
都是自己辛苦造的，
My roommates all fell asleep when I arrived our dorm.
It's time for class，we must start right away.
Please let the dogs get out of my home.
Wake up！we are late！
I saw the child readi…展開
My roommates all fell asleep when I arrived our dorm.
It's time for class，we must start right away.
Please let the dogs get out of my home.
Wake up！we are late！
I saw the child reading a science fiction comic.
I don't know what to say at first when I stand on the platform.
The injury will put her out of action for several week.
They dare not play joke on him in case he becomes angry.
The accident happened the day before yesterday.
In fact，she is very beautiful in my heart.
You need to relax after a long-time study.收起
I fell asleep while watching spike TV：當我在喝完十杯咖啡以後
I need an ambulance right away.我立刻需要一部救護車。
The door locked accidentally，and I couldn't get out of the room.門無意中反鎖上了，我無法從房間裏出來了。
Be quie…展開
I fell asleep while watching spike TV：當我在喝完十杯咖啡以後
I need an ambulance right away.我立刻需要一部救護車。
The door locked accidentally，and I couldn't get out of the room.門無意中反鎖上了，我無法從房間裏出來了。
Be quiet；don't wake your father up.安靜點兒，別吵醒你爸爸。
The small village on the National Mall looks like something out of a science fiction story
華府國家大草坪上的小聚落，看起來就像科幻小說故事的場景。
If at first you do succeed，try to hide your astonishment.
如果你開始就取得成功，那麼嘗試掩飾你的驚訝。
My whole morning's work has been put out of gear by that mishap .
我一個上午的工作全讓這倒楣的事給弄得亂了套。
One day they decided to play joke on their professor.
有一天，他們决定根教授開個玩笑。
you really love him，allow yourself be happier than the day before.
如果你真的喜歡他，請讓自己一天比一天的更加高興起來。
In fact，his symbol is the cornucopia.
實際上，他的象徵是豐饒之角。
I need to live in such community.
我需要在這樣的社區裏生活
【經典例句+經典用法+經典詞彙】是否考慮加點分啊
祝你成功哦收起
什麼時候一個句子裏動詞用單數代詞用複數英語，
如：This pair of glasses isnice.Iliketem.
其實你舉的例子，眼鏡是一個整體，但是卻有兩片鏡片，你要看修飾的詞，假如這個物體是一個整體就沒辦法用複數的咯，例如pants
這個句子特殊說明了一雙鞋那麼雖然是兩隻鞋但是強調了一雙所以是單數形式
如果句子裏說的是these shoes那麼就要用複數形式了
高中【複數】的題目.幫忙啊.
1.設複數Z滿足（1-Z）/（1+Z）=i，求|Z+1|的值.
2.若複數Z滿足Z=（1+ti）/（1-ti），求Z所對應的點Z的軌跡方程.
3.設Z屬於C且|Z|=2，則
（1）複數3Z對應的點位於什麼位置.
（2）複數3Z+1對應的點位於什麼位置.
（3）求|3Z+1|的最大值與最小值.
4.已知Z是虛數，且Z+1/Z是實數，求證（1）|Z|=1；（2）（Z-1）/（Z+1）是純虛數.
5.設複數Z滿足|Z|^2-2|Z|-3=0，求複數Z在平面內對應的點的軌跡.
能做幾題做幾題吧.最好有過程！謝謝了啊~~
1.由（1-Z）/（1+Z）=i兩邊平方則有，（1-Z）^2/（1+Z）^2=-1
即（1-Z）^2+（1+Z）^2=0，也即是2+2Z^2=0，可解得Z=-i（Z=i代回（1-Z）/（1+Z）=-i不合題意，舍去）
故|Z+1|=|-i+1|=根號2
2.Z=（1+ti）/（1-ti）=1+t^2，為一抛物線方程.
3.依題意，Z屬於C且|Z|=2，則C位於複數坐標軸以原點為圓心，半徑R=|Z|=2的圓上.
故（1）複數3Z對應的點位於複數坐標軸以原點為圓心，半徑R=3|Z|=6的圓上.
（2）複數3Z+1對應的點相當於把圓心從原點平移到（1.0），以（1.0）為圓心，半徑R=3|Z|=6的圓上.
（3）在（2）的基礎上，我們可以知道|3Z+1|的最大值與最小值：
|3Z+1|的最大值=1+6（半徑）=7，最小值=6-1=5.
注：|3Z+1|代表圓上的點到圓點的距離.
4.Z是虛數，則設Z=a+bi，Z+1/Z=（a+bi+1）/（a+bi）=（a+bi+1）*（a-bi）/（a+bi）*（a-bi）=（a^2+b^2+a-bi）/（a^2+b^2）但本人得出的是b=0.不清楚是不是本人算錯了，所以下麵本人沒法繼續求解.
.萬分抱歉
5.由|Z|^2-2|Z|-3=0得，（|Z|-3）（|Z|+1）=0，由於|Z|≥0，則|Z|=3
則複數Z在平面內對應的點的軌跡為原點為圓心，半徑R=|Z|=3的圓上.
英語，片語造句
first of all，lost and found box，be careful with，from now on，mobile phone，lost and found office，in a hurry，that“s all，worry about，just like，not…any more，traffic jam，come true，not only…but also，as well，wait a minute，why not，每個造一句話
first of all，i am astudent.yourpen is in the lost and foundbox.youshould be careful with ur study.i will study harder from now on.i have a mobilephone.youshould go to lost and found office to ch…
1，First of all，let me tell you the news.
首先，讓我告訴你這個消息。
2，maybe，you can find you pen in the lost and found box.
你應該可以在失物招領箱找到你的鋼筆
3，Be careful with the“sh”-sound.
…展開
1，First of all，let me tell you the news.
首先，讓我告訴你這個消息。
2，maybe，you can find you pen in the lost and found box.
你應該可以在失物招領箱找到你的鋼筆
3，Be careful with the“sh”-sound.
請注意“sh”的發音。
4，From now on you can work on your own.
你從現在起可以獨立工作了。
5，Please call his mobile phone.
請拔打他的手機。
6，You should go to the Lost and Found office to find your luggage
你應該去遺失物招領處領取你的行李
7，A great wall is not built in a hurry.
但長城不是一夜建成的
8，And，that's all we need to do.
這就是所有我們需要做的
9，You do not have to worry about that.
你不必為此擔心。
10，Why，that's just like the one I bought.
嗨，這正像我買的那個呢。
11，Don't talk any more！
不要再說話了
12，If there's no traffic jam，I think it's OK.
如果不塞車的話，我想能行。
13，His dream of being a doctor has come true.
他當醫生的願望實現了。
14，Father not only was angry but also beat me.
父親不只生氣也還打我了。
15，It's just as well.
這樣也無妨。
16，Wait a minute. I'll write you a check.
等一等，我給你開一張支票。
17，Why not upgrade it？
你怎麼不陞級呢？收起
first of all: First of all，please introduce yourself to us.
首先，請你向我們介紹一下自己。
lost and found box: Your watch is in the lost and found box.
…展開
first of all: First of all，please introduce yourself to us.
首先，請你向我們介紹一下自己。
lost and found box: Your watch is in the lost and found box.
你的手錶在失物招領箱裡面。
be careful with: There is hot water in this cup. Be careful with it.
這個茶杯裏有熱水，要小心拿它。
from now on: You are my good friend from now on.
從現在開始你是我的好朋友。
mobile phone: Today，almost everyone has a mobile phone.
今天，幾乎所有的人都有一部手機。
lost and found office，Excuse me，where is the lost and found office？
打擾一下，失物招領處在哪裡？
in a hurry，He left home in a hurry and forgot to lock the door.
他急匆匆離開了家，忘記了鎖門。
that“s all，That's all I know.
我知道的就這麼多。
worry about，Don't worry about me. I can take care of myself.
不要為我擔心。我能照顧我自己。
just like，It's so comfortable here that it feels just like home.
這裡好舒服，就好像是家一樣。
not…any more，He doesn't eat meat any more.
他再也不吃肉了。
traffic jam，We are stuck in a terrible traffic jam.