30:17
STRUCTURE
2593 Views
01:56
READING COMPREHENSION &VOCABULARY
1501 Views
01:52
The Form of Irregular Verbs
1507 Views
01:59
The Tense of the Passive Voice
1629 Views
09:31
Changing from Active into Passive
1364 Views
07:20
The Form of the Passive Voice
1587 Views
03:29
What is the Passive Voice?
1621 Views
03:45
The Form of the Active Voice
1576 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2114 Views
03:20
Since vs For
1694 Views
04:50
Have or Has
1523 Views
00:49
Key Words: Present Perfect
3453 Views
09:03
The Use of the Present Perfect
1547 Views
03:08
Meaning and Form
1605 Views
02:40
Writing Formal Letters
1583 Views
03:10
Language Use
2152 Views
09:35
Parallel Structure
1726 Views
04:35
Prepositions of Instruments and Means
1544 Views
03:27
Polite Requests
1621 Views
06:30
May as a Modal of Permission and Request
1709 Views
04:11
Can as a Modal of Permission and Request
1490 Views
02:50
عناصر الاداء
1468 Views
03:45
شركة ستيرن
1031 Views
01:15
مقياس القيمة المضافة
1313 Views
02:58
مقياس الربحية
1209 Views
02:39
معايير دركر
1419 Views
03:51
مقايس الاداء
1399 Views
01:41
اتخاذ اجراءات تصحيحية
1095 Views
01:52
المرحلة الثانية من الرقابة
1188 Views
02:49
مراحل الرقابة
2575 Views