+动名词如：likeswimming
+名词的复数如：likemasks
+动名词如：goclimbing
any+名词复数如：howmanywatches
erent+名词复数如：differentcountries
前加the,后面一般跟单数，如：thesamehobby
7.序数词前一定加the,如：thefirstday
8.在几点用at,如at7o’clock,在某一天或某一天的具体时间段用on,如：onSunday,onSundaymorning,直接在早上、下午或晚上用in,如：inthemorning
9.动词后代词用宾格(动宾)如：joinme
10.介词后代词用宾格(介宾)如：withhim,toher
to+动原，wouldliketo+动原，sorryto+动原，forgetto+动原，it’stimeto+动原，
12.情态动词can后面加动原，let后加动原
13.祈使句中动词用原形，否定句在句首加Don’t
14.助动词(dodoesdon’tdoesn’t)后动词用原形
15.形容词加名词(形名)如：abeautifulgirl
16.动词加副词(动副)如：dancebeautifully
用于肯定句，any用于否定句
ebe结构就近原则如：Thereisateacherandsomestudentsintheclassroom.
19.不可数名词：watercoffeeteamilkjuicebreadricefoodfruitpaperchocolateexercisefish
20.乐器前加the,球类前不加the,(playthe乐器，play球类)如：playthepiano,playfootball
