【W(wǎng)hat are they drawing?】
What are they drawing?他們?cè)诋?huà)什么？
drawing 是draw 的分詞形式，表示“畫(huà)”，“拉”，draw 是一個(gè)不規(guī)則動(dòng)詞，過(guò)去式是drew .例如：
The boy can draw a house.
小孩會(huì)畫(huà)房子。
Who drew the picture on the blackboard？
誰(shuí)在黑板上畫(huà)的畫(huà)兒。
【I'm trying to draw a horse.】
I'm trying to draw a horse.我在試圖畫(huà)一匹馬。
Try to do 表示“努力去做”。例如：
I'll try to study Chinese well.
我要盡力學(xué)好中文。
Are you trying to mend you kite?
你在試圖修好你的風(fēng)箏嗎？
【Please don't play with my chalk.】
Please don't play with my chalk.請(qǐng)不要玩粉筆。
Play with 表示“玩耍”，play 后面直接跟一些運(yùn)動(dòng)球類或者樂(lè)器類表示參加這種運(yùn)動(dòng)或演奏這種樂(lè)器。
Don't play with fire.
不要玩火。
We are going to play basketball in the afternoon.
今天下午我們要去打藍(lán)球。
The little girl plays piano（鋼琴）very well.
小女孩鋼琴演奏得很好。
【W(wǎng)hat was Li Lei drawing when the teacher came in?】
What was Li Leo drawing when the teacher came in?老師進(jìn)來(lái)時(shí)，林濤正在畫(huà)什么？
was drawing 是過(guò)去進(jìn)行時(shí)。表示過(guò)去某一時(shí)間正在干某事，其構(gòu)成形式是was（were）+現(xiàn)在分詞。When …表示“當(dāng)…時(shí)候”，when 在本句中起連詞作用，引導(dǎo)出一個(gè)時(shí)間狀語(yǔ)從句。例如：
I was reading a book at ten o'clock last night.
昨天晚上十點(diǎn)鐘我正在讀書(shū)。
What were you doing when I called you?
昨天我給你打電話的時(shí)候，你在干什么？
【He found it very difficult to get to sleep.】
He found it very difficult to get to sleep.他覺(jué)得很難入睡。句中的“find it +形容詞+不定式”表示“發(fā)現(xiàn)干某事怎么怎么樣”。不定式的內(nèi)容就是指干某事的內(nèi)容，但寫(xiě)在后面，而用it 代替不定式寫(xiě)在動(dòng)詞的后面，形容詞作it 補(bǔ)語(yǔ)。例如：
I find it hard to finish the work today.
我發(fā)現(xiàn)今天難于完成工作。
I feel it very happy to work with you.
我感覺(jué)和你一起工作很幸福。
I think it important to have a walk after supper.
我覺(jué)得晚飯后散步很重要。
【He was just falling asleep when there was a loud knock at the door.】
He was just falling asleep when there was a loud knock at the door.他剛要入睡，突然就有人大聲敲門(mén)。
was（were）doing …when（從句）….表示過(guò)去某一動(dòng)作正在進(jìn)行時(shí)，另一動(dòng)作就開(kāi)始了。例如：
I was walking in the street when I met a friend of mine.
我正在街上散步，這時(shí)就碰見(jiàn)一位朋友。
What are they drawing?他們?cè)诋?huà)什么？
drawing 是draw 的分詞形式，表示“畫(huà)”，“拉”，draw 是一個(gè)不規(guī)則動(dòng)詞，過(guò)去式是drew .例如：
The boy can draw a house.
小孩會(huì)畫(huà)房子。
Who drew the picture on the blackboard？
誰(shuí)在黑板上畫(huà)的畫(huà)兒。
【I'm trying to draw a horse.】
I'm trying to draw a horse.我在試圖畫(huà)一匹馬。
Try to do 表示“努力去做”。例如：
I'll try to study Chinese well.
我要盡力學(xué)好中文。
Are you trying to mend you kite?
你在試圖修好你的風(fēng)箏嗎？
【Please don't play with my chalk.】
Please don't play with my chalk.請(qǐng)不要玩粉筆。
Play with 表示“玩耍”，play 后面直接跟一些運(yùn)動(dòng)球類或者樂(lè)器類表示參加這種運(yùn)動(dòng)或演奏這種樂(lè)器。
Don't play with fire.
不要玩火。
We are going to play basketball in the afternoon.
今天下午我們要去打藍(lán)球。
The little girl plays piano（鋼琴）very well.
小女孩鋼琴演奏得很好。
【W(wǎng)hat was Li Lei drawing when the teacher came in?】
What was Li Leo drawing when the teacher came in?老師進(jìn)來(lái)時(shí)，林濤正在畫(huà)什么？
was drawing 是過(guò)去進(jìn)行時(shí)。表示過(guò)去某一時(shí)間正在干某事，其構(gòu)成形式是was（were）+現(xiàn)在分詞。When …表示“當(dāng)…時(shí)候”，when 在本句中起連詞作用，引導(dǎo)出一個(gè)時(shí)間狀語(yǔ)從句。例如：
I was reading a book at ten o'clock last night.
昨天晚上十點(diǎn)鐘我正在讀書(shū)。
What were you doing when I called you?
昨天我給你打電話的時(shí)候，你在干什么？
【He found it very difficult to get to sleep.】
He found it very difficult to get to sleep.他覺(jué)得很難入睡。句中的“find it +形容詞+不定式”表示“發(fā)現(xiàn)干某事怎么怎么樣”。不定式的內(nèi)容就是指干某事的內(nèi)容，但寫(xiě)在后面，而用it 代替不定式寫(xiě)在動(dòng)詞的后面，形容詞作it 補(bǔ)語(yǔ)。例如：
I find it hard to finish the work today.
我發(fā)現(xiàn)今天難于完成工作。
I feel it very happy to work with you.
我感覺(jué)和你一起工作很幸福。
I think it important to have a walk after supper.
我覺(jué)得晚飯后散步很重要。
【He was just falling asleep when there was a loud knock at the door.】
He was just falling asleep when there was a loud knock at the door.他剛要入睡，突然就有人大聲敲門(mén)。
was（were）doing …when（從句）….表示過(guò)去某一動(dòng)作正在進(jìn)行時(shí)，另一動(dòng)作就開(kāi)始了。例如：
I was walking in the street when I met a friend of mine.
我正在街上散步，這時(shí)就碰見(jiàn)一位朋友。