30:17
STRUCTURE
2558 Views
01:56
READING COMPREHENSION &VOCABULARY
1451 Views
01:52
The Form of Irregular Verbs
1469 Views
01:59
The Tense of the Passive Voice
1582 Views
09:31
Changing from Active into Passive
1317 Views
07:20
The Form of the Passive Voice
1537 Views
03:29
What is the Passive Voice?
1570 Views
03:45
The Form of the Active Voice
1522 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2042 Views
03:20
Since vs For
1668 Views
04:50
Have or Has
1484 Views
00:49
Key Words: Present Perfect
3388 Views
09:03
The Use of the Present Perfect
1491 Views
03:08
Meaning and Form
1545 Views
02:40
Writing Formal Letters
1526 Views
03:10
Language Use
2110 Views
09:35
Parallel Structure
1684 Views
04:35
Prepositions of Instruments and Means
1498 Views
03:27
Polite Requests
1591 Views
06:30
May as a Modal of Permission and Request
1625 Views
04:11
Can as a Modal of Permission and Request
1412 Views
02:50
عناصر الاداء
1441 Views
03:45
شركة ستيرن
1007 Views
01:15
مقياس القيمة المضافة
1292 Views
02:58
مقياس الربحية
1182 Views
02:39
معايير دركر
1383 Views
03:51
مقايس الاداء
1358 Views
01:41
اتخاذ اجراءات تصحيحية
1054 Views
01:52
المرحلة الثانية من الرقابة
1126 Views
02:49
مراحل الرقابة
2491 Views