30:17
STRUCTURE
2711 Views
01:56
READING COMPREHENSION &VOCABULARY
1590 Views
01:52
The Form of Irregular Verbs
1599 Views
01:59
The Tense of the Passive Voice
1727 Views
09:31
Changing from Active into Passive
1453 Views
07:20
The Form of the Passive Voice
1688 Views
03:29
What is the Passive Voice?
1711 Views
03:45
The Form of the Active Voice
1672 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2280 Views
03:20
Since vs For
1782 Views
04:50
Have or Has
1599 Views
00:49
Key Words: Present Perfect
3644 Views
09:03
The Use of the Present Perfect
1659 Views
03:08
Meaning and Form
1728 Views
02:40
Writing Formal Letters
1697 Views
03:10
Language Use
2254 Views
09:35
Parallel Structure
1827 Views
04:35
Prepositions of Instruments and Means
1650 Views
03:27
Polite Requests
1708 Views
06:30
May as a Modal of Permission and Request
1845 Views
04:11
Can as a Modal of Permission and Request
1678 Views
02:50
عناصر الاداء
1567 Views
03:45
شركة ستيرن
1128 Views
01:15
مقياس القيمة المضافة
1365 Views
02:58
مقياس الربحية
1268 Views
02:39
معايير دركر
1478 Views
03:51
مقايس الاداء
1476 Views
01:41
اتخاذ اجراءات تصحيحية
1156 Views
01:52
المرحلة الثانية من الرقابة
1329 Views
02:49
مراحل الرقابة
2776 Views