Period 3: Grammar—Review of verb forms (1)Objectives● To review present simple, present continuous, present perfect and future reference; for and since with present perfect● To use the present perfect tense: for or sinceProcedures▇ Reviewing Present simple, present continuous, present perfect Active TensesSimple PresentPresent Action or ConditionGeneral TruthsNon-action; Habitual ActionFuture TimeI hear you.Here comes the bus.There are thirty days in September.I like music.I run on Tuesdays and Sundays.The train leaves at 4:00 p.m.Present ProgressiveActivity in ProgressVerbs of PerceptionI am playing soccer nowHe is feeling sadPresent PerfectWith verbs of state that begin in the past and lead up to and include the presentTo express habitual or continued actionWith events occurring at an indefinited or unspecified time in the past -- with ever, never, beforeTHE PASSIVE TENSES Simple presentactive:passive:The company ships the computers to many foreign countries.Computers are shipped to many foreign countries.Present Progressiveactive:passive:The chef is preparing the food.The food is being prepared.Present Perfectactive:passive:Someone has made the arrangements for us.The arrangements have been made for us.■ Using the Present Perfect Tense: FOR or SINCE?We use Present Perfect tense to talk about action which started in the past and continues up to the present.用心 爱心 专心1Examples I have had this computer for about a year. How long have you been at this school? I haven't seen Julia since September. Tip! For other uses of the Present Perfect tense, see the Present Perfect Tense - When To Use.We use for with a period of time, for example: a few days, half an hour, two years. We use since with the time when ...
