30:17
STRUCTURE
2652 Views
01:56
READING COMPREHENSION &VOCABULARY
1540 Views
01:52
The Form of Irregular Verbs
1537 Views
01:59
The Tense of the Passive Voice
1672 Views
09:31
Changing from Active into Passive
1401 Views
07:20
The Form of the Passive Voice
1624 Views
03:29
What is the Passive Voice?
1652 Views
03:45
The Form of the Active Voice
1619 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2189 Views
03:20
Since vs For
1732 Views
04:50
Have or Has
1552 Views
00:49
Key Words: Present Perfect
3517 Views
09:03
The Use of the Present Perfect
1593 Views
03:08
Meaning and Form
1650 Views
02:40
Writing Formal Letters
1632 Views
03:10
Language Use
2195 Views
09:35
Parallel Structure
1774 Views
04:35
Prepositions of Instruments and Means
1581 Views
03:27
Polite Requests
1657 Views
06:30
May as a Modal of Permission and Request
1761 Views
04:11
Can as a Modal of Permission and Request
1577 Views
02:50
عناصر الاداء
1496 Views
03:45
شركة ستيرن
1060 Views
01:15
مقياس القيمة المضافة
1332 Views
02:58
مقياس الربحية
1234 Views
02:39
معايير دركر
1439 Views
03:51
مقايس الاداء
1428 Views
01:41
اتخاذ اجراءات تصحيحية
1123 Views
01:52
المرحلة الثانية من الرقابة
1242 Views
02:49
مراحل الرقابة
2673 Views