30:17
STRUCTURE
2598 Views
01:56
READING COMPREHENSION &VOCABULARY
1508 Views
01:52
The Form of Irregular Verbs
1512 Views
01:59
The Tense of the Passive Voice
1638 Views
09:31
Changing from Active into Passive
1369 Views
07:20
The Form of the Passive Voice
1595 Views
03:29
What is the Passive Voice?
1627 Views
03:45
The Form of the Active Voice
1581 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2122 Views
03:20
Since vs For
1701 Views
04:50
Have or Has
1529 Views
00:49
Key Words: Present Perfect
3461 Views
09:03
The Use of the Present Perfect
1553 Views
03:08
Meaning and Form
1612 Views
02:40
Writing Formal Letters
1590 Views
03:10
Language Use
2158 Views
09:35
Parallel Structure
1731 Views
04:35
Prepositions of Instruments and Means
1548 Views
03:27
Polite Requests
1628 Views
06:30
May as a Modal of Permission and Request
1719 Views
04:11
Can as a Modal of Permission and Request
1499 Views
02:50
عناصر الاداء
1471 Views
03:45
شركة ستيرن
1034 Views
01:15
مقياس القيمة المضافة
1314 Views
02:58
مقياس الربحية
1209 Views
02:39
معايير دركر
1421 Views
03:51
مقايس الاداء
1404 Views
01:41
اتخاذ اجراءات تصحيحية
1097 Views
01:52
المرحلة الثانية من الرقابة
1192 Views
02:49
مراحل الرقابة
2583 Views