三種時態(tài)：一般現(xiàn)在、 現(xiàn)在進行、一般過去 掌握現(xiàn)在分詞、過去式
祈使句:肯定 動詞原形開頭 否定：前面加don't
非謂語動詞：want to do would like to do decide to do hope to do ask sb.to do tell sb.to do want sb.to do would like sb.to do would like sb.to do it's time to do
practice doing enjoy doing spend...(in) doing what about doing Thanks for doing watch/see/hear/ find sb.do/ doing have (fun ) doing
help sb do/ to do why not do had better do make/ let sb.do
情態(tài)動詞 can 表示能力；允許 have to 必須,不得不
介詞用法（Unit2）across from next to in front of behind on the left/ right of betwwn...and...