【正文】
in 2 hours。 last week 一般過去式 ( 3) tomorrow。 this morning。制成 停止砍伐樹 Tree Planting Day dig a hole put the tree in the hole water the tree carry water produce oxygen take in harmful gase be made of stop cutting down trees 詞性轉(zhuǎn)換 1 save (v) _____(adj) _______(n) 2 discuss (v) __________(n) 3 convenient (adj) __________ (n) 4 container (n) __________(v) 5 fight (v) ___________(n) 6 harmful (adj) ___________(n) 7 pollute (v) ___________(n) (pl of n) 8 branch ______ 9 gas ________ 10 root ________ 過去式 11 fight_____ 12 dig ______ 13 carry _____ safe safety discussion convenience contain fighter harm pollution branches gases roots fought dug carried 14 save sb =_____________ 15 take in =______________ 16 be good for =___________ =__________ 17 produce sth =___________ 18 convenient =______________ 19 discuss=________________ 20 be harmful to =________________ rescue sb absorb be helpful to be useful for make sth easy talk about be bad for Unit 4 Grammar The present continuous tense 現(xiàn)在進(jìn)行時(shí) Ving 變化規(guī)則: 1) 一般在動(dòng)詞原形后加 ing .