30:17
STRUCTURE
2671 Views
01:56
READING COMPREHENSION &VOCABULARY
1563 Views
01:52
The Form of Irregular Verbs
1562 Views
01:59
The Tense of the Passive Voice
1695 Views
09:31
Changing from Active into Passive
1422 Views
07:20
The Form of the Passive Voice
1647 Views
03:29
What is the Passive Voice?
1674 Views
03:45
The Form of the Active Voice
1637 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2226 Views
03:20
Since vs For
1748 Views
04:50
Have or Has
1570 Views
00:49
Key Words: Present Perfect
3570 Views
09:03
The Use of the Present Perfect
1624 Views
03:08
Meaning and Form
1675 Views
02:40
Writing Formal Letters
1653 Views
03:10
Language Use
2221 Views
09:35
Parallel Structure
1796 Views
04:35
Prepositions of Instruments and Means
1604 Views
03:27
Polite Requests
1673 Views
06:30
May as a Modal of Permission and Request
1792 Views
04:11
Can as a Modal of Permission and Request
1611 Views
02:50
عناصر الاداء
1525 Views
03:45
شركة ستيرن
1088 Views
01:15
مقياس القيمة المضافة
1348 Views
02:58
مقياس الربحية
1251 Views
02:39
معايير دركر
1456 Views
03:51
مقايس الاداء
1454 Views
01:41
اتخاذ اجراءات تصحيحية
1136 Views
01:52
المرحلة الثانية من الرقابة
1272 Views
02:49
مراحل الرقابة
2716 Views