1、I often/usually/sometimes經(jīng)常性、習(xí)慣性的發(fā)生的動作經(jīng)常性、習(xí)慣性的發(fā)生的動作 play football watch TV cook Chinese food study English do homeworkI often play football.He often plays football. I often cook Chinese food.He often cooks Chinese food. I often watch TV.He often watches TV.在一般現(xiàn)在時中，當(dāng)在一般現(xiàn)在時中，當(dāng)主語主語是是第三人稱單數(shù)第三人稱單數(shù)時，謂語動詞時

2、，謂語動詞要用第三人稱單數(shù)形式，即要用第三人稱單數(shù)形式，即常在動詞原形后加常在動詞原形后加-s或或-es。1.一般情況下，直接在動詞后一般情況下，直接在動詞后+s ， come play like draw read comes plays likes draws reads2.以以s, sh, ch, x, o 結(jié)尾的動詞，在結(jié)尾的動詞，在詞尾詞尾+ es watch teach wash go watches teaches washes goes I often study English.He often studies English.3.以以輔音字母輔音字母+ y 結(jié)尾結(jié)尾的動詞，

3、的動詞，變變y 為為i，再，再+ es study fly studies flies I often do homework.He often does homework.I often have an English class.He often has an English class.4.不規(guī)則變化動詞不規(guī)則變化動詞have do has doesDo you often play football?Yes, I do.No, I dont.Yes, he does.No, he doesnt.Does he often play football?I often play footb

4、all.Do you often play football?He often plays football.Does he often play football.在一般現(xiàn)在時中，當(dāng)在一般現(xiàn)在時中，當(dāng)主語是第三人稱單數(shù)主語是第三人稱單數(shù)時，時，疑問形式？疑問形式？當(dāng)主語為第一二人稱時，怎樣變成疑問句？當(dāng)主語為第一二人稱時，怎樣變成疑問句？I often play football。Do you often play football?句子前加句子前加上上doHe plays football.Does he play football?句子前加句子前加does后后還有什么變化還有什么變化Sh

5、e often watches TV.She often does homework.Does she often watch TV?Does she often do homework.I often play football.I dont often play fooball.He often plays football.He doesnt play football.在一般現(xiàn)在時中，當(dāng)主語是第在一般現(xiàn)在時中，當(dāng)主語是第三人稱單數(shù)時，否定形式？三人稱單數(shù)時，否定形式？1.He often watches TV.He doesnt watch TV.2.He often cooks Chinese food.He doesnt often cookk Chinese food.對比變化對比變化I often play football. I dont often play football.Do you often play footbal