Dinosaurs

课件26张PPT。Unit 5 Dinosaurs It is a dog but it doesn’t bite or bark. hot dogWhat has hands but no feet, a face but no eyes, tells but not talk? clock.Let me guess!They don’t live on the earth now but they lived on the earth long time ago. Some are very big some are not. Some can even fly. They are very powerful. dinosaursis very eats has teeth walks does not Its brain is very maybe it is not .longplantssmallslowlyfly or swimsmallcleverDiplodocusis very eats has teeth runs does not has a roar Maybe it is very .bigmeatsharpfastfly or swimloudrudeTyrannosaurus Rexis not so nor so eats drinks a lot of has a lot of runs but does not does not lives near bigsmallfishwaterteethflyswimlakeBaryonyxWhen did the dinosaurs live on Earth? When did they die?They lived on Earth 100,000,000 years ago. They died 65,000,000 years ago.Think of it.is very long eats plants has small teeth walks slowly does not fly His brain is very small maybe it is not clever. very long plants small teeth slowly not fly His brain very small maybe it not clever.wasatehadwalkeddid waswas100,000,000 years agoDiplodocusTyrannosaurus Rexis very big eats meat has sharp teeth runs fast does not fly has a loud roar Maybe it is very rude .100,000,000 years ago very big meat sharp teeth fast not fly a loud roar Maybe it very rude .wasatehad randidhadwasBaryonyxis not so big nor so small eats fish drinks a lot of water has a lot of teeth runs but does not fly does not swim lives near lakes 100,000,000 years ago not so big nor so small fish a lot of water a lot of teeth but not fly not swim near lakes wasatedrankhadrandiddidlived不规则动词变化规则 I． 过去式与动词原形同形。例如： let—let, put—put , hit—hit, read—read [red]等。 II．动词原形以 ow／aw 结尾，过去式常变为 ew 。例如：??? know—knew, grow—grew, throw—threw, draw—drew等。 但是也有一些例外，例如：show—showed。 III．许多动词只要将动词原形中的元音字母 i 改为 a ，就 可变为过去式。例如：??? begin—began, give—gave, sing—sang, swim—swam, sit—sat, drink— drank, ring—rang 等。??? ?但是 win—won , rise--rose例外。IV．有些动词的过去式以 o(a)ught 结尾。例如：??? bring—brought, buy—bought, think—thought, catch—caught, teach—taught等。?? [注意]上述动词过去式究竟是以ought还是aught结尾， 只要记住“有a则a，无a则o”即可。 ??? 即:原形中有a的，????? ?过去式变为aught，否则为ought。 V． 以eep结尾的动词，常将 eep 改为 ept 构成过去式。 例如： keep—kept, sleep—slept, sweep—swept等。 Write the past tense of the following words.am are does will can shall think catch buy take shake stand have sit get see tell fly hear was were did would could should thought caught bought took shook stoodhad sat got saw told flew heardFill in the blanks with the proper form of the verbs.1.Tim_____(write) a letter to his friend last week. 2.My brother_____(catch) the first bus to school yesterday. 3.He_____(know) less English words when he was seven years old. 4. They_____(keep) doing the work and never gave up. 5. Did you _____(run) as fast as Jacky?wrote ... ...