外研社新时代核心英语教程 综合英语2教学课件.pdfVIP

乐民之乐者，民亦乐其乐；忧民之忧者，民亦忧其忧。——《孟子》

Unit1

Grammar

I.Verb-ingandto-infinitive

1.Verb-ing

Verb-ingisthepresentparticipleofthe

verb,whichisusedtodescribeanaction

thatishappeningatthesametimeas

乐民之乐者，民亦乐其乐；忧民之忧者，民亦忧其忧。——《孟子》

anotheraction.

Examples:

Isawhimwalkingdownthestreet.

Hewasseenwalkingdownthestreet.

2.To-infinitive

To-infinitiveisusedtodescribeanaction

thatwillhappenafteranotheraction.

乐民之乐者，民亦乐其乐；忧民之忧者，民亦忧其忧。——《孟子》

Examples:

Iwatchedhimtowalkdownthestreet.

Hewaswatchedtowalkdownthestreet.

II.VerbTense

1.PresentSimple

乐民之乐者，民亦乐其乐；忧民之忧者，民亦忧其忧。——《孟子》

Thepresentsimpletenseisusedto

describeanactionthathappensregularly

orhabitually.

Examples:

Igotoschooleveryday.

Healwaysgoestoschoolontime.

2.PresentContinuous

乐民之乐者，民亦乐其乐；忧民之忧者，民亦忧其忧。——《孟子》

Thepresentcontinuoustenseisusedto

describeanactionthatishappeningatthe

momentofspeaking.

Examples:

Iamgoingtoschoolnow.

Heisrunningtoschoolnow.

3.PastSimple

乐民之乐者，民亦乐其乐；忧民之忧者，民亦忧其忧。——《孟子》

Thepastsimpletenseisusedtodescribean

actionthathappenedinthepast.

Examples:

Iwenttoschoolyesterday.

Herantoschoolyesterday.

4.PastContinuous

Thepastcontinuoustenseisusedto

乐民之乐者，民亦乐其乐；忧民之忧者，民亦忧其忧。——《孟子》

describeanactionthatwasinprogressata

certainpointinthepast.

Examples:

IwasgoingtoschoolwhenIsawhim.

HewasrunningtoschoolwhenIsawhim.

III.ModalVerbs