30:17
STRUCTURE
2596 Views
01:56
READING COMPREHENSION &VOCABULARY
1505 Views
01:52
The Form of Irregular Verbs
1510 Views
01:59
The Tense of the Passive Voice
1635 Views
09:31
Changing from Active into Passive
1367 Views
07:20
The Form of the Passive Voice
1592 Views
03:29
What is the Passive Voice?
1624 Views
03:45
The Form of the Active Voice
1579 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2120 Views
03:20
Since vs For
1698 Views
04:50
Have or Has
1525 Views
00:49
Key Words: Present Perfect
3458 Views
09:03
The Use of the Present Perfect
1550 Views
03:08
Meaning and Form
1610 Views
02:40
Writing Formal Letters
1588 Views
03:10
Language Use
2154 Views
09:35
Parallel Structure
1730 Views
04:35
Prepositions of Instruments and Means
1546 Views
03:27
Polite Requests
1625 Views
06:30
May as a Modal of Permission and Request
1717 Views
04:11
Can as a Modal of Permission and Request
1496 Views
02:50
عناصر الاداء
1470 Views
03:45
شركة ستيرن
1031 Views
01:15
مقياس القيمة المضافة
1314 Views
02:58
مقياس الربحية
1209 Views
02:39
معايير دركر
1421 Views
03:51
مقايس الاداء
1401 Views
01:41
اتخاذ اجراءات تصحيحية
1096 Views
01:52
المرحلة الثانية من الرقابة
1189 Views
02:49
مراحل الرقابة
2577 Views