itis的用法有哪些？
1、结构不一样
it引导的主语从句，形式主语就是it，真正的主语在句子的后面，通常是to do的不定式短语。而强调句的结构 it is/was+被强调部分+that/who+句子其余部分，结构词it is/was和that/who都是没有实际意思的，只是构成句子结构的词而已。
2、句式不一样
形式主语真正的主语在句子的后面，通常是to do的不定式短语。强调句只能强调名词和代词，也就是主语和宾语，不能强调其他句子成分。
3、区别方法不一样
判断强调句的最好办法是:把It is /was 后的部分放到 that/who 之后的句子里，如果能组成完整的句子，就是强调句，否则就不是。例如：
It is the boy who I care for. 把the boy 放到后面，是 I care for the boy. 句子完整，所以原句是强调句。
It is fun that we spend the holiday here. 无论怎样，fun 都不能放到后面组成完整的句子，所以原句不是强调句。
扩展资料：
主语从句中it做形式主语的常见句型：
1、It + be + 形容词+主语从句，如：It is uncertain whether he can come to Jenny’s birthday party or not.
2、 It + be + 名词词组 + 主语从句，这类名词有：a fact, a pity, a shame, an honour，a question等，如：It’s a pity that you missed the exciting football match.
3、It + be + 过去分词+ 主语从句，这类过去分词有：announced, believed, expected, hoped, decided, reported, said, shown等，
如：It is reported that 16 people were killed in the earthquake.
it做形式主语，后面内容做句子真正主语，除了由主语从句充当之外，还可以由不定时，不定时短语，动名词以及动名词短语充当，例如：It is very useful to learn English so well.
绛旓細It is 鍙敤浜庡己璋冨彞銆佸畾璇粠鍙ャ佷富璇粠鍙ョ瓑澶氱鍙ュ瀷锛屼妇渚嬪涓嬶細涓銆両t is(was)⋯⋯that⋯⋯鍙ュ瀷, It is + 琚己璋冩垚鍒 + that +鍙ュ瓙鍓╀綑閮ㄥ垎 锛堝己璋冨彞锛夊彲浠ュ垎鍒敤鏉ュ己璋冧富璇佸璇佸湴鐐圭姸璇拰鏃堕棿鐘惰銆傚锛1銆両t was he who( that)read three books in the library...
绛旓細itis璇讳綔锛歔ɪt ɪz]銆俰t is 鐨勫父鐢ㄥ彛璇舰寮廼ts锛岃闊充负锛氳嫳 [ts]銆佺編 [ts]銆it鍙互浣滃厛琛岃瘝锛岀敤浜庡己璋冨彞鍨嬩腑锛屽己璋冧富璇佸璇佹椂闂寸姸璇佸湴鐐圭姸璇佷粙璇嶅璇垨浠庡彞绛锛屽己璋冨彞鍨嬩腑鐨刬t涓鑸寚宸插彂鐢熻繃鐨勪簨锛岃屼笉鎸囧皻鏈彂鐢熸垨鎻愬強鐨勪簨銆備緥鍙ワ細1銆両tis also an important method to te...
绛旓細it寮曞鐨勪富璇粠鍙ワ紝褰㈠紡涓昏灏辨槸it锛岀湡姝ｇ殑涓昏鍦ㄥ彞瀛愮殑鍚庨潰锛岄氬父鏄痶o do鐨勪笉瀹氬紡鐭銆傝屽己璋冨彞鐨勭粨鏋 it is/was+琚己璋冮儴鍒+that/who+鍙ュ瓙鍏朵綑閮ㄥ垎锛岀粨鏋勮瘝it is/was鍜宼hat/who閮芥槸娌℃湁瀹為檯鎰忔濈殑锛屽彧鏄瀯鎴愬彞瀛愮粨鏋勭殑璇嶈屽凡銆2銆佸彞寮忎笉涓鏍 褰㈠紡涓昏鐪熸鐨勪富璇湪鍙ュ瓙鐨勫悗闈紝閫氬父鏄痶o do鐨勪笉瀹...
绛旓細褰㈠璇嶆垨鑰呭悕璇嶉兘鍙互銆侷t is鍙敤浜庡己璋冨彞銆佸畾璇粠鍙ャ佷富璇粠鍙ョ瓑澶氱鍙ュ瀷锛屼妇渚嬪涓:涓銆両t is (w.s...鍙ュ瀷, It is+琚己璋冩垚鍒+that+鍙ュ瓙鍓╀綑閮ㄥ垎(寮鸿皟鍙)锛屽彲浠ュ垎鍒敤鏉ュ己璋冧富璇佸璇佸湴鐐圭姸璇拰鏃堕棿鐘惰銆傚锛欼t was he who(that)read three books in the library yesterday. (寮鸿皟涓昏)缈...
绛旓細浠ヤ笅鏄竴浜涘父瑙佺殑鐢ㄦ硶锛1. It is + 褰㈠璇嶏細鐢ㄤ簬鎻忚堪浜嬬墿鐨勬ц川鎴栫姸鎬銆 渚嬪锛欼t is cold today.锛堜粖澶╁緢鍐枫傦級2. It is + 鍚嶈瘝锛氱敤浜庢寚浠ｇ壒瀹氱殑浜嬬墿鎴栨蹇点 渚嬪锛欼t is a cat.锛堣繖鏄竴鍙尗銆傦級3. It is + 杩囧幓鍒嗚瘝锛氱敤浜庤〃杈捐鍔ㄨ鎬併 渚嬪锛欼t is done.锛堝凡缁忓畬鎴愩傦級4...
绛旓細闄や簡鍖诲涓婄殑浣跨敤锛itis涓璇嶅湪鏃ュ父鐢ㄨ涓篃缁忓父鐢ㄦ潵褰㈠杩囧害銆佹崯浼ゆ垨鐤插姵寮曡捣鐨勭姸鎬併備緥濡傦紝甯歌鈥渢he runners' knee鈥濊〃绀鸿倢鑲夎繃搴︿娇鐢ㄥ鑷寸柤鐥涳紝杩欎釜鐘跺喌琚О涓簉unner's knee銆傚彟涓涓緥瀛愭槸鈥渨riter's cramp鈥濓紝琛ㄧず浣滃鍥犺繃搴︿娇鐢ㄦ墜鎸囧鑷寸殑鎵嬮儴鑲岃倝鐤插姵鍜岀棄鎸涖傝繖绉鐢ㄦ硶宸茬粡鎴愪负浜嗚嫳璇瑷鐨勪範鎯敤娉曘傚...
绛旓細- "It is"鐢ㄤ簬鎸囦唬鏌愪釜鐗瑰畾鐨勪汉銆佺墿鎴栨儏鍐点備緥鍙ワ細- There is a cat in the garden. (鑺卞洯閲屾湁涓鍙尗)- It is a beautiful day today. (浠婂ぉ鏄釜缇庡ソ鐨勪竴澶)2. 鐢ㄦ硶鍖哄埆锛- "There is"鐢ㄤ簬鎻忚堪鏌愬瀛樺湪鏌愪汉銆佺墿鎴栨儏鍐电殑鎯呭喌銆- "It is"閫氬父鐢ㄤ簬鎸囦唬鐗瑰畾鐨勪汉銆佺墿鎴栨儏鍐碉紝涓鑸敤浜庣粰鍑...
绛旓細1銆乼here is锛歵here is鐢ㄤ簬鍚嶈瘝鍗曟暟鍓嶃2銆it is锛歩t is鐢ㄤ簬褰㈠璇嶅墠銆備笁銆鐢ㄦ硶涓嶅悓 1銆乼here is锛欼t was very difficult for them to fly because men have not got wings.瀵逛粬浠潵璇达紝椋炶捣鏉ュ緢鍥伴毦锛屽洜涓轰汉绫绘病鏈夌繀鑶銆2銆乮t is锛歍here is time for us to go home and come back here ...
绛旓細its 瀹冪殑,褰㈠璇嶆х墿涓讳唬璇.琛ㄧず"璋佺殑"鍚庨潰+鍚嶈瘝.姣斿璇:Its leg was hurt.its杩樺彲浠ュ綋鍚嶈瘝鎬х墿涓讳唬璇嶃傜瓑浜 褰㈠璇嶆х墿涓讳唬璇+鍚嶈瘝銆備篃瑙ｉ噴鎴愨滃畠鐨勨濇瘮濡傝锛歍he house is its.it`s=it is瑙ｉ噴鎴愨滃畠鏄濇瘮濡傝锛欼t`s a dog.
绛旓細绀轰緥鐢ㄦ硶锛- "It is a beautiful day today."锛堜粖澶╂槸涓編濂界殑涓澶╋級- "It is important to get enough sleep."锛堝厖瓒崇殑鐫＄湢寰堥噸瑕侊級鎬昏岃█涔嬶紝"Is it" 鏄竴涓枒闂彞缁撴瀯鐢ㄦ潵纭畾鏌愮墿鐨勭壒鎬ф垨鐘跺喌锛岃 "It is" 鏄竴绉嶆弿杩版煇浠朵簨鎯呯殑鎬ц川鎴栫姸鍐电殑闄堣堪鎬у彞瀛愩傝嫳璇娉曟槸鎸囪嫳璇腑鍗曡瘝銆佺煭璇拰...
