高中英语人教版选择性必修第一册：UNIT 4 SPACE EXPLORATION 3.Discovering Useful Structures-教学课件 (2).pptx

Unit4DiscoveringUsefulStructures

LearningObjectivesInthisclass,youwill:1.identifyandunderstandthegrammaticalfeaturesofinfinitivesusedasattributesandadverbials.2.strengthentheknowledgeofinfinitiveusagebydoingexercises.

LookatthesentenceonP40onyourtextbookandpleasetrytransformingthetwopartswithinfinitivesintoclauses.1....andscientistsworkhardtofindanswers....andscientistsworkhard________theycanfindanswers.sothattheymakevehicles_______cancarrybravepeopleintospace________________findoutthesecretsoftheuniverse.2.Theymakevehiclestocarrybravepeopleintospacetofindoutthesecretsoftheuniverse.which/thatsothattheycan目的状语从句目的状语目的状语从句定语从句目的状语定语

3.Thesedisastersmadeeveryonesadanddisappointed,butthedesiretoexploretheuniverseneverdied....butthedesirewhichwastoexploretheuniverseneverdied.4.Chinabecamethethirdcountryintheworldtoindependentlysendhumansintospacein2003.Chinabecamethethirdcountryintheworldthatindependentlysendhumansintospacein2003.定语定语

1.Wemustfindapersontodothework.2.Therearelotsofinterestingthingstosee.3.Thatgirlhasnothingtoworryabout.4.Heisalwaysthefirsttoarrive.5.Theygottheordertoleavethecity.summary1：·动词不定式todo在句中可作_______，通常放在名词或代词_____（前/后），往往表示_________(已发生/未发生)。·若不定式动词为不及物动词，则该动词必须与____词连用（如3）。·被only,last,next以及序数词或形容词最高级修饰的名词常用不定式作定语（如4）。后未发生介定语Theygottheorderthattheymustleavethecity.

1.Wewereshockedtofindthatthetrainhadalreadyleft.2.ThissignalledonestepfurtherinChinasplantoestablishaspacestationinthefuture.3.Scientistsworkhardtofindoutthesecretsoftheuniverse.summary2：·动词不定式todo在句中可作_______，可表示___________________。·常见结构：表目的:_____________________表原因:_____________________表结果:_____________________状语目的、原因、结果等inorderto;soastosb.+be+adj.+totoo...to;onlyto...Scientistsworkhardsothattheycanfind