if possible的用法
if possible是if it is possible的省略形式,意为”如果可能的话”,这种省略主语和be动词的用法在英语中很常见,是一种简洁的表达法.

It’s best to do sth.,It’s better to do sth. than和the best time to do sth.
It’s best to do sth.意为”最好做某事”,这个句型中的it是形式主语,不定式to so sth.是真正主语,可以转换为to do sth. is best结构.
It’s best to leave tom

That’s it.和Is this it?
That’s it.通常表示说到了问题的关键处,说到了点子上,或表示赞同或肯定对方的话,意为”对了,就是这样,问题就在这里”.  
Is this it?中的it是特指某个物件,意为”这是它吗?”

there be句型的几个难点和have
there be句型中的be不可用实义动词have代替,但可用stand (耸立),live (生活,生存),lie (躺,位于),exist (生存),seem (似乎),happen (碰巧)等.
There are

send,send for和send away
send意为”寄,送,派遣”,指送出某物或派出某人.
send for意为”派人去叫/请”,其宾语常为doctor,police等.
send away意为”叫……离开,解雇”.

“转弯”的几种说法
英语中表示”转弯”有如下几种常用说法:
turn to the right向右转       turn right into右转弯进入
turn to the left向左转        turn left into左转弯进入
take the first turning在第一个转弯处拐进去
take the second turning在第二个转弯处拐进去

after you leave还是after you will leave----需要用一般现在时代替

turn和change
turn用作及物动词,表示”翻转,转动,使变得”.
turn用作不及物动词,表示”转动,拐弯,转身”.
turn用作连系动词,表示”变得,变成”,后跟形容词或名词.
turn on (打开)radio,light,water,tap (电器)等
turn off (关掉)radio,light,water,tap (电器)等
turn down (开小,调低) radio,light,water,tap (电器)等
“打开或关闭水龙头”,要用turn on the faucet和 turn off the taucet,不用switch on或switch off.
t

need和want
need表示”需要,必需”,既可作行为动词,也可作情态动词.作行为动词时,后接名词、动词或不定式.need着重客观上的需要.
The bike needs repairing.这辆自行车需要修理.
=The bike needs to be repaired.
need还可作名词.
A friend in need is a friend in deed.患难中的朋友才是真正的朋友.
want意为”想要,要求,要”,是行为动词,后接名词或不定式.want强调主观上的要求.
want doing表示”需要,有必要”

have been to和have been in
have been to +地点名词表示”去过或到过某地”,而现在已返回,不在那里了,只表示过去的经历,常同once,twice,ever,never,several times等表示次数或时间的副词连用.
have been in/at意为”一直在……,一直待在……”,表示已在某地待了多少时间,指包括现在在内的一段时间,常同for或since引导的短语连用.
I have been to the school for eight years.(误)
I have been in the school for eight years.(正)我到这所学校

like和would like能否换用
like意为”喜欢,喜好”.若表示一时的爱好或具体某次想做某事,后接不定式;若表示一般性的爱好,可用动名词或不定式.常用结构为:   
like +sb./sth.喜欢某人或某物(名词或代词)
like doing sth.喜欢做某事(一般的习惯)
like to do sth.喜欢做某事(某次具体行为)
would like意为”想要,愿望,希望”,用于委婉地提出要求或表示乐意提供帮助,为一种习惯用法,would不是过去式,通用于所有人称,不可改用will. would like

“go and +动词原形”结构的含义
go and +动词原形表示”去做某事”,相当于go to do sth.,常用于祈使句.come and +动词原形也是同类用法,意为”来做某事”.

go fishing
go + 动名词是一种习惯表达法,意为”去……”.
go fishing去钓鱼         go swimming去游泳
go boating去划船        go shopping去买东西
g

every time,each time和the next time
这3个短语都是用作连词的,引导时间状语从句.every time和each time同义,表示”每次”,所引导从句可以放在主句前,也可以放在主句后.the next time表示”下次,下一次”,引导的从句一般放在主句前.
Every time I see her I think of her mother.每次我见到她,就会想到她母亲.
I think of her mother every time I see her.
Each time I walked past his window,I saw him at work.我每次路过他的窗前,