30:17
STRUCTURE
2710 Views
01:56
READING COMPREHENSION &VOCABULARY
1587 Views
01:52
The Form of Irregular Verbs
1597 Views
01:59
The Tense of the Passive Voice
1725 Views
09:31
Changing from Active into Passive
1451 Views
07:20
The Form of the Passive Voice
1684 Views
03:29
What is the Passive Voice?
1709 Views
03:45
The Form of the Active Voice
1671 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2276 Views
03:20
Since vs For
1781 Views
04:50
Have or Has
1599 Views
00:49
Key Words: Present Perfect
3630 Views
09:03
The Use of the Present Perfect
1657 Views
03:08
Meaning and Form
1722 Views
02:40
Writing Formal Letters
1691 Views
03:10
Language Use
2251 Views
09:35
Parallel Structure
1824 Views
04:35
Prepositions of Instruments and Means
1645 Views
03:27
Polite Requests
1707 Views
06:30
May as a Modal of Permission and Request
1837 Views
04:11
Can as a Modal of Permission and Request
1669 Views
02:50
عناصر الاداء
1564 Views
03:45
شركة ستيرن
1125 Views
01:15
مقياس القيمة المضافة
1364 Views
02:58
مقياس الربحية
1267 Views
02:39
معايير دركر
1478 Views
03:51
مقايس الاداء
1475 Views
01:41
اتخاذ اجراءات تصحيحية
1154 Views
01:52
المرحلة الثانية من الرقابة
1327 Views
02:49
مراحل الرقابة
2773 Views