30:17
STRUCTURE
2660 Views
01:56
READING COMPREHENSION &VOCABULARY
1551 Views
01:52
The Form of Irregular Verbs
1553 Views
01:59
The Tense of the Passive Voice
1683 Views
09:31
Changing from Active into Passive
1414 Views
07:20
The Form of the Passive Voice
1636 Views
03:29
What is the Passive Voice?
1666 Views
03:45
The Form of the Active Voice
1628 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2204 Views
03:20
Since vs For
1741 Views
04:50
Have or Has
1562 Views
00:49
Key Words: Present Perfect
3548 Views
09:03
The Use of the Present Perfect
1613 Views
03:08
Meaning and Form
1665 Views
02:40
Writing Formal Letters
1641 Views
03:10
Language Use
2211 Views
09:35
Parallel Structure
1786 Views
04:35
Prepositions of Instruments and Means
1593 Views
03:27
Polite Requests
1667 Views
06:30
May as a Modal of Permission and Request
1772 Views
04:11
Can as a Modal of Permission and Request
1598 Views
02:50
عناصر الاداء
1513 Views
03:45
شركة ستيرن
1073 Views
01:15
مقياس القيمة المضافة
1339 Views
02:58
مقياس الربحية
1243 Views
02:39
معايير دركر
1446 Views
03:51
مقايس الاداء
1437 Views
01:41
اتخاذ اجراءات تصحيحية
1131 Views
01:52
المرحلة الثانية من الرقابة
1257 Views
02:49
مراحل الرقابة
2697 Views