30:17
STRUCTURE
2655 Views
01:56
READING COMPREHENSION &VOCABULARY
1544 Views
01:52
The Form of Irregular Verbs
1547 Views
01:59
The Tense of the Passive Voice
1677 Views
09:31
Changing from Active into Passive
1405 Views
07:20
The Form of the Passive Voice
1630 Views
03:29
What is the Passive Voice?
1657 Views
03:45
The Form of the Active Voice
1625 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2199 Views
03:20
Since vs For
1737 Views
04:50
Have or Has
1558 Views
00:49
Key Words: Present Perfect
3534 Views
09:03
The Use of the Present Perfect
1603 Views
03:08
Meaning and Form
1659 Views
02:40
Writing Formal Letters
1637 Views
03:10
Language Use
2205 Views
09:35
Parallel Structure
1779 Views
04:35
Prepositions of Instruments and Means
1587 Views
03:27
Polite Requests
1662 Views
06:30
May as a Modal of Permission and Request
1770 Views
04:11
Can as a Modal of Permission and Request
1595 Views
02:50
عناصر الاداء
1505 Views
03:45
شركة ستيرن
1065 Views
01:15
مقياس القيمة المضافة
1335 Views
02:58
مقياس الربحية
1241 Views
02:39
معايير دركر
1444 Views
03:51
مقايس الاداء
1432 Views
01:41
اتخاذ اجراءات تصحيحية
1125 Views
01:52
المرحلة الثانية من الرقابة
1251 Views
02:49
مراحل الرقابة
2683 Views