30:17
STRUCTURE
2670 Views
01:56
READING COMPREHENSION &VOCABULARY
1560 Views
01:52
The Form of Irregular Verbs
1560 Views
01:59
The Tense of the Passive Voice
1692 Views
09:31
Changing from Active into Passive
1421 Views
07:20
The Form of the Passive Voice
1645 Views
03:29
What is the Passive Voice?
1673 Views
03:45
The Form of the Active Voice
1636 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2221 Views
03:20
Since vs For
1746 Views
04:50
Have or Has
1568 Views
00:49
Key Words: Present Perfect
3566 Views
09:03
The Use of the Present Perfect
1622 Views
03:08
Meaning and Form
1674 Views
02:40
Writing Formal Letters
1652 Views
03:10
Language Use
2220 Views
09:35
Parallel Structure
1795 Views
04:35
Prepositions of Instruments and Means
1602 Views
03:27
Polite Requests
1672 Views
06:30
May as a Modal of Permission and Request
1789 Views
04:11
Can as a Modal of Permission and Request
1611 Views
02:50
عناصر الاداء
1525 Views
03:45
شركة ستيرن
1086 Views
01:15
مقياس القيمة المضافة
1348 Views
02:58
مقياس الربحية
1251 Views
02:39
معايير دركر
1454 Views
03:51
مقايس الاداء
1453 Views
01:41
اتخاذ اجراءات تصحيحية
1136 Views
01:52
المرحلة الثانية من الرقابة
1270 Views
02:49
مراحل الرقابة
2715 Views