مراجعه شامله ووافيه للــــ tense

tense	Time words	Examples
Simple present	Every day, month, week, year; always; sometimes; never; frequently	George jogs three miles every day.
		Mary always has salad for lunch.
		I sometimes go to New York City.
Simple past	Yesterday; # years, weeks, months, days, hours ago; in (past year); last (month, week, year)	Tom went to Los Angeles yesterday.
		Charles Lindbergh flew to Paris in 1927.
Simple future	Tomorrow; in (future year, month, week); on (future day); next (month, week, year, name of day); # days, months, weeks, years from now; this month, week, afternoon, year; someday ( next )	Mary will go to Hawaii in two weeks.
		Ed will drive to Tripole next Saturday.
		George will paint his house six days from now.
Present Progressive	Now; right now; at this moment ( just now )	You are reading sentences about verb tenses right now.
		Many students are taking calculus this semester.
Future progressive	At this time tomorrow	At this time tomorrow, I will be cleaning my house.
Present Perfect	For; since; yet; never; always; so far; # times; many times; lately; recently; already	Sam has visited Hawaii many times.
		Paul has been here for six hours.
		Yoko has known Mary since 1994.
		I have already written a letter to the president.
Present perfect progressive	For; since; lately; recently	Rita has been jogging for two hours.

 Time Clauses

 الجمل الوقتية هي الجمل التي  ماتتحدث عن الوقت 

و في غالب الكلمات الوقتية تتعامل مع اكثر من جملة 

-------------------------------------

Some verb tenses often work with time clauses. 

Sentences with time clauses have two parts:

1.       The clause with the time word

2.        The main clause

Remember the following tips:

Ø       The part with the time word is always dependent.  

Ø       Most time words work with more than one tense.

Ø       In the present, past, and future perfect progressive tenses, for is not always necessary, but it is frequently used. 

Ø       *Before and after do not require the use of the past perfect, but it is possible.

Time Clause Patterns

Time word	Time clause tense	Main clause tense	Examples
While	Past progressive	Simple past (short action)	While Anna was sleeping, a plane flew over her house.
		Past progressive (action at same time)	While George was frying fish, Rita was peeling potatoes.
	Present progressive	Future progressive	While Anna is working tomorrow, her sister will be painting the living room.
Before	Simple present	Simple future	Before Karen leaves for work, she will roller-skate around her house three times.
	Simple past	Simple past or past perfect*	Before Karen left for work, she (had) roller-skated around her house three times.
After	Simple present	Simple future	After Karen takes her motorcycle to the mechanic, he will take a look at it.
	Simple past or past perfect*	Simple past	After Karen took [had taken] her motorcycle to the mechanic, she drove to work in a rented car.
When	Simple present	Simple future	When John finishes this semester, he will take a trip to France.
	Simple past	Simple past	When the sun rose, John got up.
		Past progressive	When the pizza arrived, John was checking his e-mail.
		Past perfect	When John’s friend came to pick him up, he had already checked his answering machine for messages.
		Past perfect progressive	When John got home, his brother had been surfing the web for five hours.
Until	Simple present	Simple future	Until Mary finishes her scuba-diving course, she won’t take the advanced diving class.
	Simple past	Past perfect	Until Mary lost $50,000 in Las Vegas, she hadn’t realized that she had a gambling problem.
As soon as	Simple present	Simple future	As soon as I get home, I will take a nap.
	Simple past	Simple past	As soon as I got home, I took a nap.
Whenever	Simple present	Simple present	Whenever Sam goes to Canada, he always visits Niagara Falls.
The first time	Simple past	Simple past	The first time that Ingrid visited New York, she went to the Empire State Building.
The last time	Simple past	Simple past	The last time that Nancy played hockey, she scored three goals.
The next time	Simple present	Simple future	The next time I buy new sneakers, I will walk around in them first.
By the time	Simple present	Future perfect	By the time the plane arrives, we will have completed the crossword puzzle.
	Simple past	Past perfect	By the time John finished his essay, most of the class had left.
Since (time)	Simple past	Present perfect	Tom has been unhappy since his team lost the championship.