情态动词[下学期]
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课件20张PPT。Unit 13 Language Study
Word study & Modal VerbsYan Dang MountainNo water, no life!Water is what makes life possible?The water molecule is made up of h________ atoms and o________ atom.
Water is a liquid at room temperature, but it turns into a s_______ when the temperature drops below 0oC(centigrade) and into a gas when heated above 100oC.
The soil can a________ water, so it helps to keep water from flowing away.
Marine scientists study the r____________ between living creatures and their habitat in the ocean.
Life in the ocean appears in different sizes, r________ from the tiniest fish all the way up to the biggest blue whales.
Oil has a lower density than 1000kg/m3, it will f______ on water. Fill in the blanks with the proper words. The first letter has been given.hydrogenoxygensolidfloatabsorbrangingrelationshipRefer to P.21 in the textbook. What property of water makes the ocean
a stable environment ?Water can absorb and give off heat without big changes in temperature. Water can …Abilitydissolve solids and gases Modal verbs Modal verbsAbilitycan
could
be able to Modal verbsCould you help me with my problem?Request Modal verbsPermissionThe road signs indicate
People may/can…
Modal verbsPermissionWhen a driver sees the road signs,
he mustn’t/can’t… Modal verbsPermissionThe road signs indicate
People may/can…
Modal verbsPermissionWhen a driver sees the road signs,
he mustn’t/can’t… Modal verbsWhen a driver sees the road signs,
he must/have (got) to/should…
Necessity Modal verbs As many as 3000 million people throughout the world could face a water shortage by 2025 if the present situation continues. By then, the global population is expected to reach about 9.5 billion. Many big countries, including Egypt, the Netherlands, Iraq, will suffer severe water shortages, …If it is true, what may or will happen in the future?
What should people do to solve the problem?News reportAbility :
Request :
Permission:
Necessity:
Possibility
Certainty
Suggestions:
Advice:can / could, may / might,
must, will, should
could, may / might, shall
should, ought to, had bettercan/could, be able tocan/could, will/would, would likecan/could, may/might, (mustn’t)must, have(got) to, need Modal verbsSituation 1 One of your best classmates is absent from class, and you care much about his or her absence. (guessing, ability, necessity, suggestion, etc.)Group Discussion Your school is carrying out a ban(禁令) on the students using a cell phone in the school campus. You and your classmates argue over this school rule. (permission, necessity, request, suggestion, etc.)Situation 2Situation 3 In your family, your parents have found the charges(费用) for water and electricity are rising these days. You are having a family meeting. (guessing, request, necessity, suggestion, etc.) Finish grammar exercises on page 21 and page 98. Homework Finish grammar exercises on Exercise paper.Thank You!What could have caused a water shortage?People must /could/may/might have…People shouldn’t/oughtn’t to have done so!Guessing
Word study & Modal VerbsYan Dang MountainNo water, no life!Water is what makes life possible?The water molecule is made up of h________ atoms and o________ atom.
Water is a liquid at room temperature, but it turns into a s_______ when the temperature drops below 0oC(centigrade) and into a gas when heated above 100oC.
The soil can a________ water, so it helps to keep water from flowing away.
Marine scientists study the r____________ between living creatures and their habitat in the ocean.
Life in the ocean appears in different sizes, r________ from the tiniest fish all the way up to the biggest blue whales.
Oil has a lower density than 1000kg/m3, it will f______ on water. Fill in the blanks with the proper words. The first letter has been given.hydrogenoxygensolidfloatabsorbrangingrelationshipRefer to P.21 in the textbook. What property of water makes the ocean
a stable environment ?Water can absorb and give off heat without big changes in temperature. Water can …Abilitydissolve solids and gases Modal verbs Modal verbsAbilitycan
could
be able to Modal verbsCould you help me with my problem?Request Modal verbsPermissionThe road signs indicate
People may/can…
Modal verbsPermissionWhen a driver sees the road signs,
he mustn’t/can’t… Modal verbsPermissionThe road signs indicate
People may/can…
Modal verbsPermissionWhen a driver sees the road signs,
he mustn’t/can’t… Modal verbsWhen a driver sees the road signs,
he must/have (got) to/should…
Necessity Modal verbs As many as 3000 million people throughout the world could face a water shortage by 2025 if the present situation continues. By then, the global population is expected to reach about 9.5 billion. Many big countries, including Egypt, the Netherlands, Iraq, will suffer severe water shortages, …If it is true, what may or will happen in the future?
What should people do to solve the problem?News reportAbility :
Request :
Permission:
Necessity:
Possibility
Certainty
Suggestions:
Advice:can / could, may / might,
must, will, should
could, may / might, shall
should, ought to, had bettercan/could, be able tocan/could, will/would, would likecan/could, may/might, (mustn’t)must, have(got) to, need Modal verbsSituation 1 One of your best classmates is absent from class, and you care much about his or her absence. (guessing, ability, necessity, suggestion, etc.)Group Discussion Your school is carrying out a ban(禁令) on the students using a cell phone in the school campus. You and your classmates argue over this school rule. (permission, necessity, request, suggestion, etc.)Situation 2Situation 3 In your family, your parents have found the charges(费用) for water and electricity are rising these days. You are having a family meeting. (guessing, request, necessity, suggestion, etc.) Finish grammar exercises on page 21 and page 98. Homework Finish grammar exercises on Exercise paper.Thank You!What could have caused a water shortage?People must /could/may/might have…People shouldn’t/oughtn’t to have done so!Guessing