30:17
STRUCTURE
2649 Views
01:56
READING COMPREHENSION &VOCABULARY
1539 Views
01:52
The Form of Irregular Verbs
1534 Views
01:59
The Tense of the Passive Voice
1669 Views
09:31
Changing from Active into Passive
1397 Views
07:20
The Form of the Passive Voice
1621 Views
03:29
What is the Passive Voice?
1649 Views
03:45
The Form of the Active Voice
1613 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2184 Views
03:20
Since vs For
1728 Views
04:50
Have or Has
1550 Views
00:49
Key Words: Present Perfect
3508 Views
09:03
The Use of the Present Perfect
1590 Views
03:08
Meaning and Form
1646 Views
02:40
Writing Formal Letters
1628 Views
03:10
Language Use
2191 Views
09:35
Parallel Structure
1772 Views
04:35
Prepositions of Instruments and Means
1578 Views
03:27
Polite Requests
1653 Views
06:30
May as a Modal of Permission and Request
1755 Views
04:11
Can as a Modal of Permission and Request
1573 Views
02:50
عناصر الاداء
1493 Views
03:45
شركة ستيرن
1058 Views
01:15
مقياس القيمة المضافة
1330 Views
02:58
مقياس الربحية
1233 Views
02:39
معايير دركر
1437 Views
03:51
مقايس الاداء
1427 Views
01:41
اتخاذ اجراءات تصحيحية
1121 Views
01:52
المرحلة الثانية من الرقابة
1233 Views
02:49
مراحل الرقابة
2663 Views