30:17
STRUCTURE
2574 Views
01:56
READING COMPREHENSION &VOCABULARY
1472 Views
01:52
The Form of Irregular Verbs
1485 Views
01:59
The Tense of the Passive Voice
1600 Views
09:31
Changing from Active into Passive
1336 Views
07:20
The Form of the Passive Voice
1559 Views
03:29
What is the Passive Voice?
1590 Views
03:45
The Form of the Active Voice
1540 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2071 Views
03:20
Since vs For
1680 Views
04:50
Have or Has
1497 Views
00:49
Key Words: Present Perfect
3410 Views
09:03
The Use of the Present Perfect
1510 Views
03:08
Meaning and Form
1562 Views
02:40
Writing Formal Letters
1547 Views
03:10
Language Use
2127 Views
09:35
Parallel Structure
1703 Views
04:35
Prepositions of Instruments and Means
1520 Views
03:27
Polite Requests
1606 Views
06:30
May as a Modal of Permission and Request
1674 Views
04:11
Can as a Modal of Permission and Request
1441 Views
02:50
عناصر الاداء
1452 Views
03:45
شركة ستيرن
1014 Views
01:15
مقياس القيمة المضافة
1300 Views
02:58
مقياس الربحية
1191 Views
02:39
معايير دركر
1394 Views
03:51
مقايس الاداء
1378 Views
01:41
اتخاذ اجراءات تصحيحية
1070 Views
01:52
المرحلة الثانية من الرقابة
1167 Views
02:49
مراحل الرقابة
2542 Views