30:17
STRUCTURE
2582 Views
01:56
READING COMPREHENSION &VOCABULARY
1480 Views
01:52
The Form of Irregular Verbs
1487 Views
01:59
The Tense of the Passive Voice
1609 Views
09:31
Changing from Active into Passive
1345 Views
07:20
The Form of the Passive Voice
1569 Views
03:29
What is the Passive Voice?
1598 Views
03:45
The Form of the Active Voice
1550 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2074 Views
03:20
Since vs For
1683 Views
04:50
Have or Has
1506 Views
00:49
Key Words: Present Perfect
3423 Views
09:03
The Use of the Present Perfect
1521 Views
03:08
Meaning and Form
1573 Views
02:40
Writing Formal Letters
1555 Views
03:10
Language Use
2133 Views
09:35
Parallel Structure
1708 Views
04:35
Prepositions of Instruments and Means
1527 Views
03:27
Polite Requests
1609 Views
06:30
May as a Modal of Permission and Request
1684 Views
04:11
Can as a Modal of Permission and Request
1455 Views
02:50
عناصر الاداء
1457 Views
03:45
شركة ستيرن
1016 Views
01:15
مقياس القيمة المضافة
1301 Views
02:58
مقياس الربحية
1192 Views
02:39
معايير دركر
1399 Views
03:51
مقايس الاداء
1381 Views
01:41
اتخاذ اجراءات تصحيحية
1077 Views
01:52
المرحلة الثانية من الرقابة
1171 Views
02:49
مراحل الرقابة
2553 Views