3. be made of,be made from,be made up of,be made by,be made in辨析 (1)be made of表示“由……制成”,指从原料到制成品,没有发生本质变化(属物理变化)。
This table is made of wood.
(2)be made from表示“由……制成”,指从原料到制成品,发生了质的变化(属化学变化)。
Paper is made from wood.
(3)be made up of表示“由……组成”,强调主语由两部分或两个以上的部分构成或组成。
The team is made up of twelve members.
(4)be made by表示“由……做”,后面接指人的名词或代词,强调动作的执行者。
The kite was made by my grandma.
(5)be made in接表时间的数词或名词时,表示“某物何时制造的或何时产的”;接指地点的名词时,表示“某地产某物”。
This bike was made in Tianjin.
The car was made in 2005.
sometimes,sometime,some time,some times 辨析 (1)sometimes是个频度副词,意为“有时”,表示动作发生的不经常性,常与一般现在时或一般过去时连用。
Sometimes I have lunch at school.
(2)sometime是个副词,意为“在某时”,指时间上不确定的某一点,常用于一般过去时或一般将来时。
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